13904015381 has 2 divisors, whose sum is σ = 13904015382. Its totient is φ = 13904015380.

The previous prime is 13904015371. The next prime is 13904015399. The reversal of 13904015381 is 18351040931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10415223025 + 3488792356 = 102055^2 + 59066^2 .

It is a cyclic number.

It is not a de Polignac number, because 13904015381 - 2⁶ = 13904015317 is a prime.

It is a super-2 number, since 2×13904015381² (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 (13904015351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6952007690 + 6952007691.

It is an arithmetic number, because the mean of its divisors is an integer number (6952007691).

Almost surely, 2^13904015381 is an apocalyptic number.

It is an amenable number.

13904015381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13904015381 is an equidigital number, since it uses as much as digits as its factorization.

13904015381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 13904015381 in words is "thirteen billion, nine hundred four million, fifteen thousand, three hundred eighty-one".