864359977 has 4 divisors (see below), whose sum is σ = 930849220. Its totient is φ = 797870736.

The previous prime is 864359959. The next prime is 864359981. The reversal of 864359977 is 779953468.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63696361 + 800663616 = 7981^2 + 28296^2 .

It is not a de Polignac number, because 864359977 - 2²⁷ = 730142249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864359927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33244602 + ... + 33244627.

It is an arithmetic number, because the mean of its divisors is an integer number (232712305).

Almost surely, 2^864359977 is an apocalyptic number.

It is an amenable number.

864359977 is a deficient number, since it is larger than the sum of its proper divisors (66489243).

864359977 is a wasteful number, since it uses less digits than its factorization.

864359977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66489242.

The product of its digits is 11430720, while the sum is 58.

The square root of 864359977 is about 29399.9996088435. Note that the first 3 decimals coincide. The cubic root of 864359977 is about 952.5728877844.

The spelling of 864359977 in words is "eight hundred sixty-four million, three hundred fifty-nine thousand, nine hundred seventy-seven".