318604621 has 2 divisors, whose sum is σ = 318604622. Its totient is φ = 318604620.

The previous prime is 318604613. The next prime is 318604687. The reversal of 318604621 is 126406813.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249482025 + 69122596 = 15795^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 318604621 - 2³ = 318604613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318604691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159302310 + 159302311.

It is an arithmetic number, because the mean of its divisors is an integer number (159302311).

Almost surely, 2^318604621 is an apocalyptic number.

It is an amenable number.

318604621 is a deficient number, since it is larger than the sum of its proper divisors (1).

318604621 is an equidigital number, since it uses as much as digits as its factorization.

318604621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 318604621 is about 17849.4991806493. The cubic root of 318604621 is about 682.9947365270.

It can be divided in two parts, 318604 and 621, that added together give a square (319225 = 565²).

The spelling of 318604621 in words is "three hundred eighteen million, six hundred four thousand, six hundred twenty-one".