12913791 has 16 divisors (see below), whose sum is σ = 18845568. Its totient is φ = 7800800.

The previous prime is 12913783. The next prime is 12913793. The reversal of 12913791 is 19731921.

It is a cyclic number.

It is not a de Polignac number, because 12913791 - 2³ = 12913783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12913793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15805 + ... + 16601.

It is an arithmetic number, because the mean of its divisors is an integer number (1177848).

Almost surely, 2^12913791 is an apocalyptic number.

12913791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12913791 is a deficient number, since it is larger than the sum of its proper divisors (5931777).

12913791 is a wasteful number, since it uses less digits than its factorization.

12913791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its digits is 3402, while the sum is 33.

The square root of 12913791 is about 3593.5763523265. The cubic root of 12913791 is about 234.6125560805.

The spelling of 12913791 in words is "twelve million, nine hundred thirteen thousand, seven hundred ninety-one".