318791401 has 2 divisors, whose sum is σ = 318791402. Its totient is φ = 318791400.

The previous prime is 318791399. The next prime is 318791411. The reversal of 318791401 is 104197813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168091225 + 150700176 = 12965^2 + 12276^2 .

It is a cyclic number.

It is not a de Polignac number, because 318791401 - 2¹ = 318791399 is a prime.

Together with 318791399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (318791411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159395700 + 159395701.

It is an arithmetic number, because the mean of its divisors is an integer number (159395701).

Almost surely, 2^318791401 is an apocalyptic number.

It is an amenable number.

318791401 is a deficient number, since it is larger than the sum of its proper divisors (1).

318791401 is an equidigital number, since it uses as much as digits as its factorization.

318791401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 318791401 is about 17854.7304936255. The cubic root of 318791401 is about 683.1281776089.

The spelling of 318791401 in words is "three hundred eighteen million, seven hundred ninety-one thousand, four hundred one".