86978956 has 6 divisors (see below), whose sum is σ = 152213180. Its totient is φ = 43489476.

The previous prime is 86978951. The next prime is 86978959. The reversal of 86978956 is 65987968.

It is a self number, because there is not a number n which added to its sum of digits gives 86978956.

It is not an unprimeable number, because it can be changed into a prime (86978951) 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, 10872366 + ... + 10872373.

Almost surely, 2^86978956 is an apocalyptic number.

It is an amenable number.

86978956 is a deficient number, since it is larger than the sum of its proper divisors (65234224).

86978956 is a wasteful number, since it uses less digits than its factorization.

86978956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21744743 (or 21744741 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The square root of 86978956 is about 9326.2509080552. The cubic root of 86978956 is about 443.0690324814.

The spelling of 86978956 in words is "eighty-six million, nine hundred seventy-eight thousand, nine hundred fifty-six".