13900168517 has 2 divisors, whose sum is σ = 13900168518. Its totient is φ = 13900168516.

The previous prime is 13900168489. The next prime is 13900168537. The reversal of 13900168517 is 71586100931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11195544481 + 2704624036 = 105809^2 + 52006^2 .

It is a cyclic number.

It is not a de Polignac number, because 13900168517 - 2¹⁶ = 13900102981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13900168537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6950084258 + 6950084259.

It is an arithmetic number, because the mean of its divisors is an integer number (6950084259).

Almost surely, 2^13900168517 is an apocalyptic number.

It is an amenable number.

13900168517 is a deficient number, since it is larger than the sum of its proper divisors (1).

13900168517 is an equidigital number, since it uses as much as digits as its factorization.

13900168517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 13900168517 in words is "thirteen billion, nine hundred million, one hundred sixty-eight thousand, five hundred seventeen".