86772981 has 32 divisors (see below), whose sum is σ = 130032000. Its totient is φ = 51148800.

The previous prime is 86772971. The next prime is 86773003. The reversal of 86772981 is 18927768.

It is not a de Polignac number, because 86772981 - 2⁷ = 86772853 is a prime.

It is a super-2 number, since 2×86772981² = 15059100463252722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86772981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86772941) 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 in 31 ways as a sum of consecutive naturals, for example, 144081 + ... + 144681.

It is an arithmetic number, because the mean of its divisors is an integer number (4063500).

Almost surely, 2^86772981 is an apocalyptic number.

It is an amenable number.

86772981 is a deficient number, since it is larger than the sum of its proper divisors (43259019).

86772981 is a wasteful number, since it uses less digits than its factorization.

86772981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789.

The product of its digits is 338688, while the sum is 48.

The square root of 86772981 is about 9315.2016081242. The cubic root of 86772981 is about 442.7190118878.

The spelling of 86772981 in words is "eighty-six million, seven hundred seventy-two thousand, nine hundred eighty-one".