13969931 has 4 divisors (see below), whose sum is σ = 14043264. Its totient is φ = 13896600.

The previous prime is 13969927. The next prime is 13969973. The reversal of 13969931 is 13996931.

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

It is a cyclic number.

It is not a de Polignac number, because 13969931 - 2² = 13969927 is a prime.

It is a super-2 number, since 2×13969931² = 390317944289522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13969531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36380 + ... + 36761.

It is an arithmetic number, because the mean of its divisors is an integer number (3510816).

Almost surely, 2^13969931 is an apocalyptic number.

13969931 is a deficient number, since it is larger than the sum of its proper divisors (73333).

13969931 is an equidigital number, since it uses as much as digits as its factorization.

13969931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73332.

The product of its digits is 39366, while the sum is 41.

The square root of 13969931 is about 3737.6370877869. The cubic root of 13969931 is about 240.8415537664.

Subtracting 13969931 from its reverse (13996931), we obtain a cube (27000 = 30³).

The spelling of 13969931 in words is "thirteen million, nine hundred sixty-nine thousand, nine hundred thirty-one".