13957969 has 4 divisors (see below), whose sum is σ = 14779044. Its totient is φ = 13136896.

The previous prime is 13957949. The next prime is 13957981. The reversal of 13957969 is 96975931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11135569 + 2822400 = 3337^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 13957969 - 2⁷ = 13957841 is a prime.

It is a super-2 number, since 2×13957969² = 389649797209922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13957949) 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, 410512 + ... + 410545.

It is an arithmetic number, because the mean of its divisors is an integer number (3694761).

Almost surely, 2^13957969 is an apocalyptic number.

It is an amenable number.

13957969 is a deficient number, since it is larger than the sum of its proper divisors (821075).

13957969 is an equidigital number, since it uses as much as digits as its factorization.

13957969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821074.

The product of its digits is 459270, while the sum is 49.

The square root of 13957969 is about 3736.0365362239. The cubic root of 13957969 is about 240.7727925261.

The spelling of 13957969 in words is "thirteen million, nine hundred fifty-seven thousand, nine hundred sixty-nine".