312890065 has 16 divisors (see below), whose sum is σ = 385451136. Its totient is φ = 243683200.

The previous prime is 312890063. The next prime is 312890089. The reversal of 312890065 is 560098213.

It is not a de Polignac number, because 312890065 - 2¹ = 312890063 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 312890065.

It is not an unprimeable number, because it can be changed into a prime (312890063) 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 15 ways as a sum of consecutive naturals, for example, 114060 + ... + 116770.

It is an arithmetic number, because the mean of its divisors is an integer number (24090696).

Almost surely, 2^312890065 is an apocalyptic number.

It is an amenable number.

312890065 is a deficient number, since it is larger than the sum of its proper divisors (72561071).

312890065 is a wasteful number, since it uses less digits than its factorization.

312890065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 312890065 is about 17688.6987932974. The cubic root of 312890065 is about 678.8866332364.

The spelling of 312890065 in words is "three hundred twelve million, eight hundred ninety thousand, sixty-five".