312640617 has 8 divisors (see below), whose sum is σ = 417196096. Its totient is φ = 208256112.

The previous prime is 312640609. The next prime is 312640637. The reversal of 312640617 is 716046213.

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

It is not a de Polignac number, because 312640617 - 2³ = 312640609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312640637) 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 7 ways as a sum of consecutive naturals, for example, 38413 + ... + 45834.

It is an arithmetic number, because the mean of its divisors is an integer number (52149512).

Almost surely, 2^312640617 is an apocalyptic number.

It is an amenable number.

312640617 is a deficient number, since it is larger than the sum of its proper divisors (104555479).

312640617 is a wasteful number, since it uses less digits than its factorization.

312640617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85487.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 312640617 is about 17681.6463317192. The cubic root of 312640617 is about 678.7061737555.

The spelling of 312640617 in words is "three hundred twelve million, six hundred forty thousand, six hundred seventeen".