864359979 has 8 divisors (see below), whose sum is σ = 1317120000. Its totient is φ = 493919976.

The previous prime is 864359959. The next prime is 864359981. The reversal of 864359979 is 979953468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 864359979 - 2⁷ = 864359851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864359929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20579979 + ... + 20580020.

It is an arithmetic number, because the mean of its divisors is an integer number (164640000).

Almost surely, 2^864359979 is an apocalyptic number.

864359979 is a deficient number, since it is larger than the sum of its proper divisors (452760021).

864359979 is a wasteful number, since it uses less digits than its factorization.

864359979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41160009.

The product of its digits is 14696640, while the sum is 60.

The square root of 864359979 is about 29399.9996428571. Note that the first 3 decimals coincide. The cubic root of 864359979 is about 952.5728885191.

The spelling of 864359979 in words is "eight hundred sixty-four million, three hundred fifty-nine thousand, nine hundred seventy-nine".