86519979 has 48 divisors (see below), whose sum is σ = 155064000. Its totient is φ = 45266688.

The previous prime is 86519971. The next prime is 86520001. The reversal of 86519979 is 97991568.

It is not a de Polignac number, because 86519979 - 2³ = 86519971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86519971) 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 47 ways as a sum of consecutive naturals, for example, 121677 + ... + 122385.

It is an arithmetic number, because the mean of its divisors is an integer number (3230500).

Almost surely, 2^86519979 is an apocalyptic number.

86519979 is a deficient number, since it is larger than the sum of its proper divisors (68544021).

86519979 is a wasteful number, since it uses less digits than its factorization.

86519979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 881 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 86519979 is about 9301.6116345502. The cubic root of 86519979 is about 442.2883177887.

The spelling of 86519979 in words is "eighty-six million, five hundred nineteen thousand, nine hundred seventy-nine".