13917839 has 8 divisors (see below), whose sum is σ = 15029952. Its totient is φ = 12811680.

The previous prime is 13917779. The next prime is 13917847. The reversal of 13917839 is 93871931.

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

It is a cyclic number.

It is not a de Polignac number, because 13917839 - 2¹² = 13913743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13917796 and 13917805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13917889) 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, 4202 + ... + 6744.

It is an arithmetic number, because the mean of its divisors is an integer number (1878744).

Almost surely, 2^13917839 is an apocalyptic number.

13917839 is a deficient number, since it is larger than the sum of its proper divisors (1112113).

13917839 is a wasteful number, since it uses less digits than its factorization.

13917839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977.

The product of its digits is 40824, while the sum is 41.

The square root of 13917839 is about 3730.6620055963. The cubic root of 13917839 is about 240.5418256188.

The spelling of 13917839 in words is "thirteen million, nine hundred seventeen thousand, eight hundred thirty-nine".