13931089 has 2 divisors, whose sum is σ = 13931090. Its totient is φ = 13931088.

The previous prime is 13931087. The next prime is 13931111. The reversal of 13931089 is 98013931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 1399489 = 3540^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 13931089 - 2¹ = 13931087 is a prime.

Together with 13931087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13931087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6965544 + 6965545.

It is an arithmetic number, because the mean of its divisors is an integer number (6965545).

Almost surely, 2^13931089 is an apocalyptic number.

It is an amenable number.

13931089 is a deficient number, since it is larger than the sum of its proper divisors (1).

13931089 is an equidigital number, since it uses as much as digits as its factorization.

13931089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 13931089 is about 3732.4374073787. The cubic root of 13931089 is about 240.6181345992.

The spelling of 13931089 in words is "thirteen million, nine hundred thirty-one thousand, eighty-nine".