13980371729 has 2 divisors, whose sum is σ = 13980371730. Its totient is φ = 13980371728.

The previous prime is 13980371677. The next prime is 13980371737. The reversal of 13980371729 is 92717308931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11892338704 + 2088033025 = 109052^2 + 45695^2 .

It is a cyclic number.

It is not a de Polignac number, because 13980371729 - 2³² = 9685404433 is a prime.

It is not a weakly prime, because it can be changed into another prime (13980371759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990185864 + 6990185865.

It is an arithmetic number, because the mean of its divisors is an integer number (6990185865).

Almost surely, 2^13980371729 is an apocalyptic number.

It is an amenable number.

13980371729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13980371729 is an equidigital number, since it uses as much as digits as its factorization.

13980371729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 13980371729 in words is "thirteen billion, nine hundred eighty million, three hundred seventy-one thousand, seven hundred twenty-nine".