312675981 has 8 divisors (see below), whose sum is σ = 418691520. Its totient is φ = 207555552.

The previous prime is 312675973. The next prime is 312676031. The reversal of 312675981 is 189576213.

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

It is not a de Polignac number, because 312675981 - 2³ = 312675973 is a prime.

It is a super-2 number, since 2×312675981² = 195532538188624722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312675931) 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 7 ways as a sum of consecutive naturals, for example, 222961 + ... + 224358.

It is an arithmetic number, because the mean of its divisors is an integer number (52336440).

Almost surely, 2^312675981 is an apocalyptic number.

It is an amenable number.

312675981 is a deficient number, since it is larger than the sum of its proper divisors (106015539).

312675981 is a wasteful number, since it uses less digits than its factorization.

312675981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447555.

The product of its digits is 90720, while the sum is 42.

The square root of 312675981 is about 17682.6463234438. The cubic root of 312675981 is about 678.7317631585.

The spelling of 312675981 in words is "three hundred twelve million, six hundred seventy-five thousand, nine hundred eighty-one".