312717399 has 8 divisors (see below), whose sum is σ = 418702080. Its totient is φ = 207605496.

The previous prime is 312717389. The next prime is 312717421. The reversal of 312717399 is 993717213.

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

It is not a de Polignac number, because 312717399 - 2¹³ = 312709207 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 312717399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312717359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217357 + ... + 218790.

It is an arithmetic number, because the mean of its divisors is an integer number (52337760).

Almost surely, 2^312717399 is an apocalyptic number.

312717399 is a deficient number, since it is larger than the sum of its proper divisors (105984681).

312717399 is a wasteful number, since it uses less digits than its factorization.

312717399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436389.

The product of its digits is 71442, while the sum is 42.

The square root of 312717399 is about 17683.8174328961. The cubic root of 312717399 is about 678.7617307850.

The spelling of 312717399 in words is "three hundred twelve million, seven hundred seventeen thousand, three hundred ninety-nine".