87057697 has 4 divisors (see below), whose sum is σ = 92178756. Its totient is φ = 81936640.

The previous prime is 87057689. The next prime is 87057709. The reversal of 87057697 is 79675078.

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 29767936 + 57289761 = 5456^2 + 7569^2 .

It is a cyclic number.

It is not a de Polignac number, because 87057697 - 2³ = 87057689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87057697.

It is not an unprimeable number, because it can be changed into a prime (87057617) 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, 2560504 + ... + 2560537.

It is an arithmetic number, because the mean of its divisors is an integer number (23044689).

Almost surely, 2^87057697 is an apocalyptic number.

It is an amenable number.

87057697 is a deficient number, since it is larger than the sum of its proper divisors (5121059).

87057697 is a wasteful number, since it uses less digits than its factorization.

87057697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121058.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 87057697 is about 9330.4714243172. The cubic root of 87057697 is about 443.2026938396.

The spelling of 87057697 in words is "eighty-seven million, fifty-seven thousand, six hundred ninety-seven".