318385499 has 4 divisors (see below), whose sum is σ = 318530064. Its totient is φ = 318240936.

The previous prime is 318385493. The next prime is 318385517. The reversal of 318385499 is 994583813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994583813 = 11321 ⋅87853.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318385499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318385493) 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 in 3 ways as a sum of consecutive naturals, for example, 68927 + ... + 73400.

It is an arithmetic number, because the mean of its divisors is an integer number (79632516).

Almost surely, 2^318385499 is an apocalyptic number.

318385499 is a deficient number, since it is larger than the sum of its proper divisors (144565).

318385499 is a wasteful number, since it uses less digits than its factorization.

318385499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144564.

The product of its digits is 933120, while the sum is 50.

The square root of 318385499 is about 17843.3600815541. The cubic root of 318385499 is about 682.8381228795.

The spelling of 318385499 in words is "three hundred eighteen million, three hundred eighty-five thousand, four hundred ninety-nine".