864198679 has 4 divisors (see below), whose sum is σ = 909682840. Its totient is φ = 818714520.

The previous prime is 864198653. The next prime is 864198691. The reversal of 864198679 is 976891468.

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 864198679 - 2²⁵ = 830644247 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 (864198479) 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, 22742052 + ... + 22742089.

It is an arithmetic number, because the mean of its divisors is an integer number (227420710).

Almost surely, 2^864198679 is an apocalyptic number.

864198679 is a deficient number, since it is larger than the sum of its proper divisors (45484161).

864198679 is a wasteful number, since it uses less digits than its factorization.

864198679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45484160.

The product of its digits is 5225472, while the sum is 58.

The square root of 864198679 is about 29397.2563175545. The cubic root of 864198679 is about 952.5136309685.

The spelling of 864198679 in words is "eight hundred sixty-four million, one hundred ninety-eight thousand, six hundred seventy-nine".