13888997 has 2 divisors, whose sum is σ = 13888998. Its totient is φ = 13888996.

The previous prime is 13888969. The next prime is 13889027. The reversal of 13888997 is 79988831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11498881 + 2390116 = 3391^2 + 1546^2 .

It is a cyclic number.

It is not a de Polignac number, because 13888997 - 2⁶ = 13888933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13888937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944498 + 6944499.

It is an arithmetic number, because the mean of its divisors is an integer number (6944499).

Almost surely, 2^13888997 is an apocalyptic number.

It is an amenable number.

13888997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13888997 is an equidigital number, since it uses as much as digits as its factorization.

13888997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 53.

The square root of 13888997 is about 3726.7944670990. The cubic root of 13888997 is about 240.3755520758.

The spelling of 13888997 in words is "thirteen million, eight hundred eighty-eight thousand, nine hundred ninety-seven".