312788879 has 4 divisors (see below), whose sum is σ = 336849576. Its totient is φ = 288728184.

The previous prime is 312788873. The next prime is 312788939. The reversal of 312788879 is 978887213.

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 312788879 - 2¹⁶ = 312723343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312788879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312788873) 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, 12030329 + ... + 12030354.

It is an arithmetic number, because the mean of its divisors is an integer number (84212394).

Almost surely, 2^312788879 is an apocalyptic number.

312788879 is a deficient number, since it is larger than the sum of its proper divisors (24060697).

312788879 is a wasteful number, since it uses less digits than its factorization.

312788879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24060696.

The product of its digits is 1354752, while the sum is 53.

The square root of 312788879 is about 17685.8383742473. The cubic root of 312788879 is about 678.8134432816.

The spelling of 312788879 in words is "three hundred twelve million, seven hundred eighty-eight thousand, eight hundred seventy-nine".