13695989 has 4 divisors (see below), whose sum is σ = 13706880. Its totient is φ = 13685100.

The previous prime is 13695961. The next prime is 13696019. The reversal of 13695989 is 98959631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13695989 - 2⁸ = 13695733 is a prime.

It is a super-2 number, since 2×13695989² = 375160229376242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13695949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3269 + ... + 6170.

It is an arithmetic number, because the mean of its divisors is an integer number (3426720).

Almost surely, 2^13695989 is an apocalyptic number.

It is an amenable number.

13695989 is a deficient number, since it is larger than the sum of its proper divisors (10891).

13695989 is an equidigital number, since it uses as much as digits as its factorization.

13695989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10890.

The product of its digits is 524880, while the sum is 50.

The square root of 13695989 is about 3700.8092358294. The cubic root of 13695989 is about 239.2568971354.

The spelling of 13695989 in words is "thirteen million, six hundred ninety-five thousand, nine hundred eighty-nine".