318774947 has 2 divisors, whose sum is σ = 318774948. Its totient is φ = 318774946.

The previous prime is 318774919. The next prime is 318774961. The reversal of 318774947 is 749477813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 318774947 - 2⁸ = 318774691 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 318774895 and 318774904.

It is not a weakly prime, because it can be changed into another prime (318774977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159387473 + 159387474.

It is an arithmetic number, because the mean of its divisors is an integer number (159387474).

Almost surely, 2^318774947 is an apocalyptic number.

318774947 is a deficient number, since it is larger than the sum of its proper divisors (1).

318774947 is an equidigital number, since it uses as much as digits as its factorization.

318774947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 50.

The square root of 318774947 is about 17854.2697134327. The cubic root of 318774947 is about 683.1164244851.

The spelling of 318774947 in words is "three hundred eighteen million, seven hundred seventy-four thousand, nine hundred forty-seven".