86804979 has 4 divisors (see below), whose sum is σ = 115739976. Its totient is φ = 57869984.

The previous prime is 86804953. The next prime is 86805007. The reversal of 86804979 is 97940868.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86804979 - 2⁵ = 86804947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86804909) 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, 14467494 + ... + 14467499.

It is an arithmetic number, because the mean of its divisors is an integer number (28934994).

Almost surely, 2^86804979 is an apocalyptic number.

86804979 is a deficient number, since it is larger than the sum of its proper divisors (28934997).

86804979 is a wasteful number, since it uses less digits than its factorization.

86804979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28934996.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 86804979 is about 9316.9189649798. The cubic root of 86804979 is about 442.7734235332.

The spelling of 86804979 in words is "eighty-six million, eight hundred four thousand, nine hundred seventy-nine".