13969913 has 2 divisors, whose sum is σ = 13969914. Its totient is φ = 13969912.

The previous prime is 13969897. The next prime is 13969927. The reversal of 13969913 is 31996931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13778944 + 190969 = 3712^2 + 437^2 .

It is a cyclic number.

It is not a de Polignac number, because 13969913 - 2⁴ = 13969897 is a prime.

It is not a weakly prime, because it can be changed into another prime (13969973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6984956 + 6984957.

It is an arithmetic number, because the mean of its divisors is an integer number (6984957).

Almost surely, 2^13969913 is an apocalyptic number.

It is an amenable number.

13969913 is a deficient number, since it is larger than the sum of its proper divisors (1).

13969913 is an equidigital number, since it uses as much as digits as its factorization.

13969913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 41.

The square root of 13969913 is about 3737.6346798477. The cubic root of 13969913 is about 240.8414503263.

The spelling of 13969913 in words is "thirteen million, nine hundred sixty-nine thousand, nine hundred thirteen".