312983989 has 4 divisors (see below), whose sum is σ = 313135200. Its totient is φ = 312832780.

The previous prime is 312983969. The next prime is 312984019. The reversal of 312983989 is 989389213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312983989 - 2¹¹ = 312981941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312983959) 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, 72457 + ... + 76654.

It is an arithmetic number, because the mean of its divisors is an integer number (78283800).

Almost surely, 2^312983989 is an apocalyptic number.

It is an amenable number.

312983989 is a deficient number, since it is larger than the sum of its proper divisors (151211).

312983989 is a wasteful number, since it uses less digits than its factorization.

312983989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151210.

The product of its digits is 839808, while the sum is 52.

The square root of 312983989 is about 17691.3535095538. The cubic root of 312983989 is about 678.9545563145.

The spelling of 312983989 in words is "three hundred twelve million, nine hundred eighty-three thousand, nine hundred eighty-nine".