13831220969 has 2 divisors, whose sum is σ = 13831220970. Its totient is φ = 13831220968.

The previous prime is 13831220951. The next prime is 13831220983. The reversal of 13831220969 is 96902213831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10782745600 + 3048475369 = 103840^2 + 55213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13831220969 is a prime.

It is a super-2 number, since 2×13831220969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13831220939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6915610484 + 6915610485.

It is an arithmetic number, because the mean of its divisors is an integer number (6915610485).

Almost surely, 2^13831220969 is an apocalyptic number.

It is an amenable number.

13831220969 is a deficient number, since it is larger than the sum of its proper divisors (1).

13831220969 is an equidigital number, since it uses as much as digits as its factorization.

13831220969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 13831220969 in words is "thirteen billion, eight hundred thirty-one million, two hundred twenty thousand, nine hundred sixty-nine".