13903889 has 2 divisors, whose sum is σ = 13903890. Its totient is φ = 13903888.

The previous prime is 13903853. The next prime is 13903949. The reversal of 13903889 is 98830931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7102225 + 6801664 = 2665^2 + 2608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13903889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13903829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6951944 + 6951945.

It is an arithmetic number, because the mean of its divisors is an integer number (6951945).

Almost surely, 2^13903889 is an apocalyptic number.

It is an amenable number.

13903889 is a deficient number, since it is larger than the sum of its proper divisors (1).

13903889 is an equidigital number, since it uses as much as digits as its factorization.

13903889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 13903889 is about 3728.7918955072. The cubic root of 13903889 is about 240.4614328654.

The spelling of 13903889 in words is "thirteen million, nine hundred three thousand, eight hundred eighty-nine".