12623435917 has 2 divisors, whose sum is σ = 12623435918. Its totient is φ = 12623435916.

The previous prime is 12623435893. The next prime is 12623435927. The reversal of 12623435917 is 71953432621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6890826121 + 5732609796 = 83011^2 + 75714^2 .

It is a cyclic number.

It is not a de Polignac number, because 12623435917 - 2⁷ = 12623435789 is a prime.

It is a super-2 number, since 2×12623435917² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12623435927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6311717958 + 6311717959.

It is an arithmetic number, because the mean of its divisors is an integer number (6311717959).

Almost surely, 2^12623435917 is an apocalyptic number.

It is an amenable number.

12623435917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12623435917 is an equidigital number, since it uses as much as digits as its factorization.

12623435917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The spelling of 12623435917 in words is "twelve billion, six hundred twenty-three million, four hundred thirty-five thousand, nine hundred seventeen".