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87064261 = 832274621
BaseRepresentation
bin1010011000001…
…11111011000101
320001211022201021
411030013323011
5134242024021
612350031141
72105014444
oct514077305
9201738637
1087064261
1145166739
12251a84b1
131506491b
14b7c4d5b
15799bc41
hex5307ec5

87064261 has 8 divisors (see below), whose sum is σ = 88520544. Its totient is φ = 85617840.

The previous prime is 87064249. The next prime is 87064267. The reversal of 87064261 is 16246078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87064261 - 215 = 87031493 is a prime.

It is a super-2 number, since 2×870642612 = 15160371086952242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87064267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16531 + ... + 21151.

It is an arithmetic number, because the mean of its divisors is an integer number (11065068).

Almost surely, 287064261 is an apocalyptic number.

It is an amenable number.

87064261 is a deficient number, since it is larger than the sum of its proper divisors (1456283).

87064261 is a wasteful number, since it uses less digits than its factorization.

87064261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4931.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 87064261 is about 9330.8231684027. The cubic root of 87064261 is about 443.2138324656.

The spelling of 87064261 in words is "eighty-seven million, sixty-four thousand, two hundred sixty-one".

Divisors: 1 83 227 4621 18841 383543 1048967 87064261