87975969 has 16 divisors (see below), whose sum is σ = 126241920. Its totient is φ = 54293760.

The previous prime is 87975961. The next prime is 87975997. The reversal of 87975969 is 96957978.

It is not a de Polignac number, because 87975969 - 2³ = 87975961 is a prime.

It is a super-2 number, since 2×87975969² = 15479542242977922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87975961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11029 + ... + 17250.

It is an arithmetic number, because the mean of its divisors is an integer number (7890120).

Almost surely, 2^87975969 is an apocalyptic number.

It is an amenable number.

87975969 is a deficient number, since it is larger than the sum of its proper divisors (38265951).

87975969 is a wasteful number, since it uses less digits than its factorization.

87975969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28360.

The product of its digits is 8573040, while the sum is 60.

The square root of 87975969 is about 9379.5505755873. The cubic root of 87975969 is about 444.7555261963.

Subtracting 87975969 from its reverse (96957978), we obtain a square (8982009 = 2997²).

The spelling of 87975969 in words is "eighty-seven million, nine hundred seventy-five thousand, nine hundred sixty-nine".