86987924 has 6 divisors (see below), whose sum is σ = 152228874. Its totient is φ = 43493960.

The previous prime is 86987921. The next prime is 86987941. The reversal of 86987924 is 42978968.

It can be written as a sum of positive squares in only one way, i.e., 84971524 + 2016400 = 9218^2 + 1420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86987921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10873487 + ... + 10873494.

It is an arithmetic number, because the mean of its divisors is an integer number (25371479).

Almost surely, 2^86987924 is an apocalyptic number.

It is an amenable number.

86987924 is a deficient number, since it is larger than the sum of its proper divisors (65240950).

86987924 is a wasteful number, since it uses less digits than its factorization.

86987924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21746985 (or 21746983 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The square root of 86987924 is about 9326.7316890752. The cubic root of 86987924 is about 443.0842595613.

The spelling of 86987924 in words is "eighty-six million, nine hundred eighty-seven thousand, nine hundred twenty-four".