86856837 has 4 divisors (see below), whose sum is σ = 115809120. Its totient is φ = 57904556.

The previous prime is 86856829. The next prime is 86856839. The reversal of 86856837 is 73865868.

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 86856837 - 2³ = 86856829 is a prime.

It is a super-2 number, since 2×86856837² = 15088220267289138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86856837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86856839) 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, 14476137 + ... + 14476142.

It is an arithmetic number, because the mean of its divisors is an integer number (28952280).

Almost surely, 2^86856837 is an apocalyptic number.

It is an amenable number.

86856837 is a deficient number, since it is larger than the sum of its proper divisors (28952283).

86856837 is a wasteful number, since it uses less digits than its factorization.

86856837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28952282.

The product of its digits is 1935360, while the sum is 51.

The square root of 86856837 is about 9319.7015510155. The cubic root of 86856837 is about 442.8615781281.

The spelling of 86856837 in words is "eighty-six million, eight hundred fifty-six thousand, eight hundred thirty-seven".