13917969 has 24 divisors (see below), whose sum is σ = 22119552. Its totient is φ = 8379360.

The previous prime is 13917949. The next prime is 13917971. The reversal of 13917969 is 96971931.

13917969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13917969 - 2⁹ = 13917457 is a prime.

It is a super-2 number, since 2×13917969² = 387419722169922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13917949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4234 + ... + 6764.

It is an arithmetic number, because the mean of its divisors is an integer number (921648).

Almost surely, 2^13917969 is an apocalyptic number.

It is an amenable number.

13917969 is a deficient number, since it is larger than the sum of its proper divisors (8201583).

13917969 is a wasteful number, since it uses less digits than its factorization.

13917969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597 (or 2594 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 13917969 is about 3730.6794287368. The cubic root of 13917969 is about 240.5425745459.

The spelling of 13917969 in words is "thirteen million, nine hundred seventeen thousand, nine hundred sixty-nine".