313687499 has 2 divisors, whose sum is σ = 313687500. Its totient is φ = 313687498.

The previous prime is 313687459. The next prime is 313687523. The reversal of 313687499 is 994786313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 313687499 - 2⁸ = 313687243 is a prime.

It is not a weakly prime, because it can be changed into another prime (313687459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156843749 + 156843750.

It is an arithmetic number, because the mean of its divisors is an integer number (156843750).

Almost surely, 2^313687499 is an apocalyptic number.

313687499 is a deficient number, since it is larger than the sum of its proper divisors (1).

313687499 is an equidigital number, since it uses as much as digits as its factorization.

313687499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 313687499 is about 17711.2252258278. The cubic root of 313687499 is about 679.4628825150.

The spelling of 313687499 in words is "three hundred thirteen million, six hundred eighty-seven thousand, four hundred ninety-nine".