23799531209 has 2 divisors, whose sum is σ = 23799531210. Its totient is φ = 23799531208.

The previous prime is 23799531179. The next prime is 23799531269. The reversal of 23799531209 is 90213599732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23769005584 + 30525625 = 154172^2 + 5525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23799531209 is a prime.

It is not a weakly prime, because it can be changed into another prime (23799531269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11899765604 + 11899765605.

It is an arithmetic number, because the mean of its divisors is an integer number (11899765605).

Almost surely, 2^23799531209 is an apocalyptic number.

It is an amenable number.

23799531209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23799531209 is an equidigital number, since it uses as much as digits as its factorization.

23799531209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 918540, while the sum is 50.

The spelling of 23799531209 in words is "twenty-three billion, seven hundred ninety-nine million, five hundred thirty-one thousand, two hundred nine".