2312400509 has 2 divisors, whose sum is σ = 2312400510. Its totient is φ = 2312400508.

The previous prime is 2312400499. The next prime is 2312400523. The reversal of 2312400509 is 9050042132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907505625 + 404894884 = 43675^2 + 20122^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312400509 - 2²⁴ = 2295623293 is a prime.

It is a super-2 number, since 2×2312400509² = 10694392228046918162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2312400569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156200254 + 1156200255.

It is an arithmetic number, because the mean of its divisors is an integer number (1156200255).

Almost surely, 2^2312400509 is an apocalyptic number.

It is an amenable number.

2312400509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312400509 is an equidigital number, since it uses as much as digits as its factorization.

2312400509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2312400509 is about 48087.4256848919. The cubic root of 2312400509 is about 1322.3741534023.

The spelling of 2312400509 in words is "two billion, three hundred twelve million, four hundred thousand, five hundred nine".