13617939 has 8 divisors (see below), whose sum is σ = 18333952. Its totient is φ = 8990280.

The previous prime is 13617917. The next prime is 13617949. The reversal of 13617939 is 93971631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13617939 - 2⁷ = 13617811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13617897 and 13617906.

It is not an unprimeable number, because it can be changed into a prime (13617949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21727 + ... + 22344.

It is an arithmetic number, because the mean of its divisors is an integer number (2291744).

Almost surely, 2^13617939 is an apocalyptic number.

13617939 is a deficient number, since it is larger than the sum of its proper divisors (4716013).

13617939 is a wasteful number, since it uses less digits than its factorization.

13617939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44177.

The product of its digits is 30618, while the sum is 39.

The square root of 13617939 is about 3690.2491785786. The cubic root of 13617939 is about 238.8015427401.

The spelling of 13617939 in words is "thirteen million, six hundred seventeen thousand, nine hundred thirty-nine".