318953641 has 2 divisors, whose sum is σ = 318953642. Its totient is φ = 318953640.

The previous prime is 318953617. The next prime is 318953681. The reversal of 318953641 is 146359813.

It is an a-pointer prime, because the next prime (318953681) can be obtained adding 318953641 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274598041 + 44355600 = 16571^2 + 6660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318953641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318953594 and 318953603.

It is not a weakly prime, because it can be changed into another prime (318953681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159476820 + 159476821.

It is an arithmetic number, because the mean of its divisors is an integer number (159476821).

Almost surely, 2^318953641 is an apocalyptic number.

It is an amenable number.

318953641 is a deficient number, since it is larger than the sum of its proper divisors (1).

318953641 is an equidigital number, since it uses as much as digits as its factorization.

318953641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 318953641 is about 17859.2732494914. The cubic root of 318953641 is about 683.2440443054.

The spelling of 318953641 in words is "three hundred eighteen million, nine hundred fifty-three thousand, six hundred forty-one".