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87076145 = 5131970507
BaseRepresentation
bin1010011000010…
…10110100110001
320001211221000102
411030022310301
5134242414040
612350202145
72105064212
oct514126461
9201757012
1087076145
1145174662
12251b3355
131506a160
14b7c9409
1579a0515
hex530ad31

87076145 has 16 divisors (see below), whose sum is σ = 118453440. Its totient is φ = 60917184.

The previous prime is 87076139. The next prime is 87076151. The reversal of 87076145 is 54167078.

It is an interprime number because it is at equal distance from previous prime (87076139) and next prime (87076151).

It is a cyclic number.

It is not a de Polignac number, because 87076145 - 28 = 87075889 is a prime.

It is a super-2 number, since 2×870761452 = 15164510056122050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 87076099 and 87076108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34019 + ... + 36488.

It is an arithmetic number, because the mean of its divisors is an integer number (7403340).

Almost surely, 287076145 is an apocalyptic number.

It is an amenable number.

87076145 is a deficient number, since it is larger than the sum of its proper divisors (31377295).

87076145 is a wasteful number, since it uses less digits than its factorization.

87076145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70544.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 87076145 is about 9331.4599607993. The cubic root of 87076145 is about 443.2339973166.

The spelling of 87076145 in words is "eighty-seven million, seventy-six thousand, one hundred forty-five".

Divisors: 1 5 13 19 65 95 247 1235 70507 352535 916591 1339633 4582955 6698165 17415229 87076145