85979915 has 8 divisors (see below), whose sum is σ = 117915360. Its totient is φ = 58957632.

The previous prime is 85979903. The next prime is 85979947. The reversal of 85979915 is 51997958.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85979915 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228250 + ... + 1228319.

It is an arithmetic number, because the mean of its divisors is an integer number (14739420).

Almost surely, 2^85979915 is an apocalyptic number.

85979915 is a deficient number, since it is larger than the sum of its proper divisors (31935445).

85979915 is a wasteful number, since it uses less digits than its factorization.

85979915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456581.

The product of its digits is 1020600, while the sum is 53.

The square root of 85979915 is about 9272.5355216359. The cubic root of 85979915 is about 441.3661310534.

The spelling of 85979915 in words is "eighty-five million, nine hundred seventy-nine thousand, nine hundred fifteen".