86517517 has 4 divisors (see below), whose sum is σ = 86542560. Its totient is φ = 86492476.

The previous prime is 86517511. The next prime is 86517521. The reversal of 86517517 is 71571568.

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 a de Polignac number, because none of the positive numbers 2^k-86517517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86517517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86517511) 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 3 ways as a sum of consecutive naturals, for example, 6313 + ... + 14590.

It is an arithmetic number, because the mean of its divisors is an integer number (21635640).

Almost surely, 2^86517517 is an apocalyptic number.

It is an amenable number.

86517517 is a deficient number, since it is larger than the sum of its proper divisors (25043).

86517517 is a wasteful number, since it uses less digits than its factorization.

86517517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25042.

The product of its digits is 58800, while the sum is 40.

The square root of 86517517 is about 9301.4792909515. The cubic root of 86517517 is about 442.2841225182.

The spelling of 86517517 in words is "eighty-six million, five hundred seventeen thousand, five hundred seventeen".