13911913 has 2 divisors, whose sum is σ = 13911914. Its totient is φ = 13911912.

The previous prime is 13911907. The next prime is 13911923. The reversal of 13911913 is 31911931.

13911913 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12201049 + 1710864 = 3493^2 + 1308^2 .

It is an emirp because it is prime and its reverse (31911931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13911913 is a prime.

It is not a weakly prime, because it can be changed into another prime (13911923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6955956 + 6955957.

It is an arithmetic number, because the mean of its divisors is an integer number (6955957).

Almost surely, 2^13911913 is an apocalyptic number.

It is an amenable number.

13911913 is a deficient number, since it is larger than the sum of its proper divisors (1).

13911913 is an equidigital number, since it uses as much as digits as its factorization.

13911913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729, while the sum is 28.

The square root of 13911913 is about 3729.8676920234. The cubic root of 13911913 is about 240.5076811127.

The spelling of 13911913 in words is "thirteen million, nine hundred eleven thousand, nine hundred thirteen".