13897669 has 2 divisors, whose sum is σ = 13897670. Its totient is φ = 13897668.

The previous prime is 13897661. The next prime is 13897673. The reversal of 13897669 is 96679831.

13897669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9529569 + 4368100 = 3087^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 13897669 - 2³ = 13897661 is a prime.

It is a super-2 number, since 2×13897669² = 386290407267122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13897661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6948834 + 6948835.

It is an arithmetic number, because the mean of its divisors is an integer number (6948835).

Almost surely, 2^13897669 is an apocalyptic number.

It is an amenable number.

13897669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13897669 is an equidigital number, since it uses as much as digits as its factorization.

13897669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 13897669 is about 3727.9577519065. The cubic root of 13897669 is about 240.4255701606.

The spelling of 13897669 in words is "thirteen million, eight hundred ninety-seven thousand, six hundred sixty-nine".