2318309993 has 2 divisors, whose sum is σ = 2318309994. Its totient is φ = 2318309992.

The previous prime is 2318309989. The next prime is 2318310011. The reversal of 2318309993 is 3999038132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2318229904 + 80089 = 48148^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 2318309993 - 2² = 2318309989 is a prime.

It is a super-2 number, since 2×2318309993² = 10749122447287320098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2318309953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1159154996 + 1159154997.

It is an arithmetic number, because the mean of its divisors is an integer number (1159154997).

Almost surely, 2^2318309993 is an apocalyptic number.

It is an amenable number.

2318309993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2318309993 is an equidigital number, since it uses as much as digits as its factorization.

2318309993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 2318309993 is about 48148.8316888375. The cubic root of 2318309993 is about 1323.4996651018.

The spelling of 2318309993 in words is "two billion, three hundred eighteen million, three hundred nine thousand, nine hundred ninety-three".