86723813 has 4 divisors (see below), whose sum is σ = 94607808. Its totient is φ = 78839820.

The previous prime is 86723807. The next prime is 86723831. The reversal of 86723813 is 31832768.

It is a happy number.

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 86723813 - 2⁸ = 86723557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86723803) 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, 3941981 + ... + 3942002.

It is an arithmetic number, because the mean of its divisors is an integer number (23651952).

Almost surely, 2^86723813 is an apocalyptic number.

It is an amenable number.

86723813 is a deficient number, since it is larger than the sum of its proper divisors (7883995).

86723813 is a wasteful number, since it uses less digits than its factorization.

86723813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7883994.

The product of its digits is 48384, while the sum is 38.

The square root of 86723813 is about 9312.5621071754. The cubic root of 86723813 is about 442.6353770942.

The spelling of 86723813 in words is "eighty-six million, seven hundred twenty-three thousand, eight hundred thirteen".