13723969 has 12 divisors (see below), whose sum is σ = 16028400. Its totient is φ = 11716488.

The previous prime is 13723961. The next prime is 13723973. The reversal of 13723969 is 96932731.

It is not a de Polignac number, because 13723969 - 2³ = 13723961 is a prime.

It is a super-2 number, since 2×13723969² = 376694650225922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13723961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18202 + ... + 18940.

It is an arithmetic number, because the mean of its divisors is an integer number (1335700).

Almost surely, 2^13723969 is an apocalyptic number.

It is an amenable number.

13723969 is a deficient number, since it is larger than the sum of its proper divisors (2304431).

13723969 is an equidigital number, since it uses as much as digits as its factorization.

13723969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1125 counting only the distinct ones).

The product of its digits is 61236, while the sum is 40.

The square root of 13723969 is about 3704.5875613893. The cubic root of 13723969 is about 239.4197149844.

The spelling of 13723969 in words is "thirteen million, seven hundred twenty-three thousand, nine hundred sixty-nine".