13937979 has 8 divisors (see below), whose sum is σ = 20273472. Its totient is φ = 8447240.

The previous prime is 13937953. The next prime is 13937999. The reversal of 13937979 is 97973931.

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 13937979 - 2⁷ = 13937851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13937929) 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, 211149 + ... + 211214.

It is an arithmetic number, because the mean of its divisors is an integer number (2534184).

Almost surely, 2^13937979 is an apocalyptic number.

13937979 is a deficient number, since it is larger than the sum of its proper divisors (6335493).

13937979 is a wasteful number, since it uses less digits than its factorization.

13937979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422377.

The product of its digits is 321489, while the sum is 48.

The square root of 13937979 is about 3733.3602826408. The cubic root of 13937979 is about 240.6577961483.

The spelling of 13937979 in words is "thirteen million, nine hundred thirty-seven thousand, nine hundred seventy-nine".