318642523 has 2 divisors, whose sum is σ = 318642524. Its totient is φ = 318642522.

The previous prime is 318642503. The next prime is 318642547. The reversal of 318642523 is 325246813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318642523 - 2⁵ = 318642491 is a prime.

It is not a weakly prime, because it can be changed into another prime (318642503) 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, 159321261 + 159321262.

It is an arithmetic number, because the mean of its divisors is an integer number (159321262).

Almost surely, 2^318642523 is an apocalyptic number.

318642523 is a deficient number, since it is larger than the sum of its proper divisors (1).

318642523 is an equidigital number, since it uses as much as digits as its factorization.

318642523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 318642523 is about 17850.5608595360. The cubic root of 318642523 is about 683.0218190386.

The spelling of 318642523 in words is "three hundred eighteen million, six hundred forty-two thousand, five hundred twenty-three".