13243391 has 16 divisors (see below), whose sum is σ = 16188480. Its totient is φ = 10575360.

The previous prime is 13243387. The next prime is 13243393. The reversal of 13243391 is 19334231.

It is a happy number.

It is not a de Polignac number, because 13243391 - 2² = 13243387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13243391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12461 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (1011780).

Almost surely, 2^13243391 is an apocalyptic number.

13243391 is a deficient number, since it is larger than the sum of its proper divisors (2945089).

13243391 is a wasteful number, since it uses less digits than its factorization.

13243391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154.

The product of its digits is 1944, while the sum is 26.

The square root of 13243391 is about 3639.1470154419. The cubic root of 13243391 is about 236.5918247337.

The spelling of 13243391 in words is "thirteen million, two hundred forty-three thousand, three hundred ninety-one".