13123997 has 2 divisors, whose sum is σ = 13123998. Its totient is φ = 13123996.

The previous prime is 13123991. The next prime is 13124021. The reversal of 13123997 is 79932131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13060996 + 63001 = 3614^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123997 - 2⁸ = 13123741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13123991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561998 + 6561999.

It is an arithmetic number, because the mean of its divisors is an integer number (6561999).

Almost surely, 2^13123997 is an apocalyptic number.

It is an amenable number.

13123997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13123997 is an equidigital number, since it uses as much as digits as its factorization.

13123997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 13123997 is about 3622.7057567514. The cubic root of 13123997 is about 235.8786901681.

The spelling of 13123997 in words is "thirteen million, one hundred twenty-three thousand, nine hundred ninety-seven".