13023331991 has 2 divisors, whose sum is σ = 13023331992. Its totient is φ = 13023331990.

The previous prime is 13023331957. The next prime is 13023332011. The reversal of 13023331991 is 19913332031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13023331991 - 2¹⁰ = 13023330967 is a prime.

It is a super-2 number, since 2×13023331991² (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 (13023391991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6511665995 + 6511665996.

It is an arithmetic number, because the mean of its divisors is an integer number (6511665996).

Almost surely, 2^13023331991 is an apocalyptic number.

13023331991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13023331991 is an equidigital number, since it uses as much as digits as its factorization.

13023331991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 35.

The spelling of 13023331991 in words is "thirteen billion, twenty-three million, three hundred thirty-one thousand, nine hundred ninety-one".