86621715 has 48 divisors (see below), whose sum is σ = 160056000. Its totient is φ = 43186176.

The previous prime is 86621677. The next prime is 86621789. The reversal of 86621715 is 51712668.

It is not a de Polignac number, because 86621715 - 2⁸ = 86621459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86621715.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151951 + ... + 152519.

It is an arithmetic number, because the mean of its divisors is an integer number (3334500).

Almost surely, 2^86621715 is an apocalyptic number.

86621715 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

86621715 is a deficient number, since it is larger than the sum of its proper divisors (73434285).

86621715 is a wasteful number, since it uses less digits than its factorization.

86621715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 793 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 86621715 is about 9307.0787575909. The cubic root of 86621715 is about 442.4616073173.

The spelling of 86621715 in words is "eighty-six million, six hundred twenty-one thousand, seven hundred fifteen".