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87456161 = 136727397
BaseRepresentation
bin1010011011001…
…11100110100001
320002120020022002
411031213212201
5134342044121
612402253345
72111236142
oct515474641
9202506262
1087456161
1145404121
1225357255
1315171110
14b887ac9
157a27e0b
hex53679a1

87456161 has 4 divisors (see below), whose sum is σ = 94183572. Its totient is φ = 80728752.

The previous prime is 87456151. The next prime is 87456163. The reversal of 87456161 is 16165478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27300625 + 60155536 = 5225^2 + 7756^2 .

It is not a de Polignac number, because 87456161 - 218 = 87194017 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87456163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3363686 + ... + 3363711.

It is an arithmetic number, because the mean of its divisors is an integer number (23545893).

Almost surely, 287456161 is an apocalyptic number.

It is an amenable number.

87456161 is a deficient number, since it is larger than the sum of its proper divisors (6727411).

87456161 is a wasteful number, since it uses less digits than its factorization.

87456161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727410.

The product of its digits is 40320, while the sum is 38.

The square root of 87456161 is about 9351.7998802370. The cubic root of 87456161 is about 443.8778459646.

The spelling of 87456161 in words is "eighty-seven million, four hundred fifty-six thousand, one hundred sixty-one".

Divisors: 1 13 6727397 87456161