13437678239 has 4 divisors (see below), whose sum is σ = 13485499440. Its totient is φ = 13389857040.

The previous prime is 13437678229. The next prime is 13437678251. The reversal of 13437678239 is 93287673431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13437678239 is a prime.

It is a super-2 number, since 2×13437678239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13437678229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23910179 + ... + 23910740.

It is an arithmetic number, because the mean of its divisors is an integer number (3371374860).

Almost surely, 2^13437678239 is an apocalyptic number.

13437678239 is a deficient number, since it is larger than the sum of its proper divisors (47821201).

13437678239 is an equidigital number, since it uses as much as digits as its factorization.

13437678239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47821200.

The product of its digits is 4572288, while the sum is 53.

The spelling of 13437678239 in words is "thirteen billion, four hundred thirty-seven million, six hundred seventy-eight thousand, two hundred thirty-nine".