13439937 has 8 divisors (see below), whose sum is σ = 20479936. Its totient is φ = 7679952.

The previous prime is 13439929. The next prime is 13439939. The reversal of 13439937 is 73993431.

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

It is not a de Polignac number, because 13439937 - 2³ = 13439929 is a prime.

It is a super-3 number, since 3×13439937³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13439895 and 13439904.

It is not an unprimeable number, because it can be changed into a prime (13439939) 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 7 ways as a sum of consecutive naturals, for example, 319978 + ... + 320019.

It is an arithmetic number, because the mean of its divisors is an integer number (2559992).

Almost surely, 2^13439937 is an apocalyptic number.

It is an amenable number.

13439937 is a deficient number, since it is larger than the sum of its proper divisors (7039999).

13439937 is an equidigital number, since it uses as much as digits as its factorization.

13439937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640007.

The product of its digits is 61236, while the sum is 39.

The square root of 13439937 is about 3666.0519636252. The cubic root of 13439937 is about 237.7565066148.

The spelling of 13439937 in words is "thirteen million, four hundred thirty-nine thousand, nine hundred thirty-seven".