87655969 has 4 divisors (see below), whose sum is σ = 87773440. Its totient is φ = 87538500.

The previous prime is 87655957. The next prime is 87656027. The reversal of 87655969 is 96955678.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87655969 - 2⁵ = 87655937 is a prime.

It is a super-2 number, since 2×87655969² = 15367137802657922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87655669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57609 + ... + 59110.

It is an arithmetic number, because the mean of its divisors is an integer number (21943360).

Almost surely, 2^87655969 is an apocalyptic number.

It is an amenable number.

87655969 is a deficient number, since it is larger than the sum of its proper divisors (117471).

87655969 is a wasteful number, since it uses less digits than its factorization.

87655969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117470.

The product of its digits is 4082400, while the sum is 55.

The square root of 87655969 is about 9362.4766488360. The cubic root of 87655969 is about 444.2156261990.

The spelling of 87655969 in words is "eighty-seven million, six hundred fifty-five thousand, nine hundred sixty-nine".