312779972 has 6 divisors (see below), whose sum is σ = 547364958. Its totient is φ = 156389984.

The previous prime is 312779959. The next prime is 312779989. The reversal of 312779972 is 279977213.

It can be written as a sum of positive squares in only one way, i.e., 255232576 + 57547396 = 15976^2 + 7586^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39097493 + ... + 39097500.

It is an arithmetic number, because the mean of its divisors is an integer number (91227493).

Almost surely, 2^312779972 is an apocalyptic number.

It is an amenable number.

312779972 is a deficient number, since it is larger than the sum of its proper divisors (234584986).

312779972 is a wasteful number, since it uses less digits than its factorization.

312779972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78194997 (or 78194995 counting only the distinct ones).

The product of its digits is 333396, while the sum is 47.

The square root of 312779972 is about 17685.5865608127. The cubic root of 312779972 is about 678.8069999059.

The spelling of 312779972 in words is "three hundred twelve million, seven hundred seventy-nine thousand, nine hundred seventy-two".