86791517 has 4 divisors (see below), whose sum is σ = 86946240. Its totient is φ = 86636796.

The previous prime is 86791513. The next prime is 86791531. The reversal of 86791517 is 71519768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86791517 - 2² = 86791513 is a prime.

It is a super-2 number, since 2×86791517² = 15065534846322578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86791513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76517 + ... + 77642.

It is an arithmetic number, because the mean of its divisors is an integer number (21736560).

Almost surely, 2^86791517 is an apocalyptic number.

It is an amenable number.

86791517 is a deficient number, since it is larger than the sum of its proper divisors (154723).

86791517 is a wasteful number, since it uses less digits than its factorization.

86791517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154722.

The product of its digits is 105840, while the sum is 44.

The square root of 86791517 is about 9316.1964878377. The cubic root of 86791517 is about 442.7505334331.

The spelling of 86791517 in words is "eighty-six million, seven hundred ninety-one thousand, five hundred seventeen".