12631739 has 4 divisors (see below), whose sum is σ = 12645720. Its totient is φ = 12617760.

The previous prime is 12631721. The next prime is 12631747. The reversal of 12631739 is 93713621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93713621 = 3947 ⋅23743.

It is a cyclic number.

It is not a de Polignac number, because 12631739 - 2²⁰ = 11583163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12631769) 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, 5534 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (3161430).

Almost surely, 2^12631739 is an apocalyptic number.

12631739 is a deficient number, since it is larger than the sum of its proper divisors (13981).

12631739 is an equidigital number, since it uses as much as digits as its factorization.

12631739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13980.

The product of its digits is 6804, while the sum is 32.

The square root of 12631739 is about 3554.1157831449. The cubic root of 12631739 is about 232.8918984987.

The spelling of 12631739 in words is "twelve million, six hundred thirty-one thousand, seven hundred thirty-nine".