12997232813 has 2 divisors, whose sum is σ = 12997232814. Its totient is φ = 12997232812.

The previous prime is 12997232687. The next prime is 12997232879. The reversal of 12997232813 is 31823279921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11423761924 + 1573470889 = 106882^2 + 39667^2 .

It is a cyclic number.

It is not a de Polignac number, because 12997232813 - 2¹⁴ = 12997216429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12997232893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6498616406 + 6498616407.

It is an arithmetic number, because the mean of its divisors is an integer number (6498616407).

Almost surely, 2^12997232813 is an apocalyptic number.

It is an amenable number.

12997232813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12997232813 is an equidigital number, since it uses as much as digits as its factorization.

12997232813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The spelling of 12997232813 in words is "twelve billion, nine hundred ninety-seven million, two hundred thirty-two thousand, eight hundred thirteen".