13888969 has 2 divisors, whose sum is σ = 13888970. Its totient is φ = 13888968.

The previous prime is 13888939. The next prime is 13888997. The reversal of 13888969 is 96988831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9223369 + 4665600 = 3037^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 13888969 - 2⁵ = 13888937 is a prime.

It is a super-2 number, since 2×13888969² = 385806919765922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13888939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944484 + 6944485.

It is an arithmetic number, because the mean of its divisors is an integer number (6944485).

Almost surely, 2^13888969 is an apocalyptic number.

It is an amenable number.

13888969 is a deficient number, since it is larger than the sum of its proper divisors (1).

13888969 is an equidigital number, since it uses as much as digits as its factorization.

13888969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 52.

The square root of 13888969 is about 3726.7907105176. The cubic root of 13888969 is about 240.3753905445.

The spelling of 13888969 in words is "thirteen million, eight hundred eighty-eight thousand, nine hundred sixty-nine".