13698389 has 2 divisors, whose sum is σ = 13698390. Its totient is φ = 13698388.

The previous prime is 13698371. The next prime is 13698397. The reversal of 13698389 is 98389631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 917764 = 3575^2 + 958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13698389 is a prime.

It is a super-2 number, since 2×13698389² = 375291722390642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13698319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6849194 + 6849195.

It is an arithmetic number, because the mean of its divisors is an integer number (6849195).

Almost surely, 2^13698389 is an apocalyptic number.

It is an amenable number.

13698389 is a deficient number, since it is larger than the sum of its proper divisors (1).

13698389 is an equidigital number, since it uses as much as digits as its factorization.

13698389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 13698389 is about 3701.1334750317. The cubic root of 13698389 is about 239.2708716164.

The spelling of 13698389 in words is "thirteen million, six hundred ninety-eight thousand, three hundred eighty-nine".