12739791 has 8 divisors (see below), whose sum is σ = 17534464. Its totient is φ = 8219160.

The previous prime is 12739763. The next prime is 12739799. The reversal of 12739791 is 19793721.

12739791 = 626² + 627² + ... + 656².

12739791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12739791 - 2¹³ = 12731599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739799) 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, 68401 + ... + 68586.

It is an arithmetic number, because the mean of its divisors is an integer number (2191808).

Almost surely, 2^12739791 is an apocalyptic number.

12739791 is a deficient number, since it is larger than the sum of its proper divisors (4794673).

12739791 is a wasteful number, since it uses less digits than its factorization.

12739791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137021.

The product of its digits is 23814, while the sum is 39.

The square root of 12739791 is about 3569.2843820576. The cubic root of 12739791 is about 233.5540670834.

It can be divided in two parts, 12739 and 791, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 12739791 in words is "twelve million, seven hundred thirty-nine thousand, seven hundred ninety-one".