312616999 has 4 divisors (see below), whose sum is σ = 312659680. Its totient is φ = 312574320.

The previous prime is 312616991. The next prime is 312617003. The reversal of 312616999 is 999616213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999616213 = 6271 ⋅159403.

It is a cyclic number.

It is not a de Polignac number, because 312616999 - 2³ = 312616991 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 (312616991) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7254 + ... + 26035.

It is an arithmetic number, because the mean of its divisors is an integer number (78164920).

Almost surely, 2^312616999 is an apocalyptic number.

312616999 is a deficient number, since it is larger than the sum of its proper divisors (42681).

312616999 is an equidigital number, since it uses as much as digits as its factorization.

312616999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42680.

The product of its digits is 157464, while the sum is 46.

The square root of 312616999 is about 17680.9784514319. The cubic root of 312616999 is about 678.6890826876.

The spelling of 312616999 in words is "three hundred twelve million, six hundred sixteen thousand, nine hundred ninety-nine".