13312891 has 8 divisors (see below), whose sum is σ = 13676544. Its totient is φ = 12952680.

The previous prime is 13312889. The next prime is 13312903. The reversal of 13312891 is 19821331.

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

It is a cyclic number.

It is not a de Polignac number, because 13312891 - 2¹ = 13312889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13312801) 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, 8236 + ... + 9718.

It is an arithmetic number, because the mean of its divisors is an integer number (1709568).

Almost surely, 2^13312891 is an apocalyptic number.

13312891 is a deficient number, since it is larger than the sum of its proper divisors (363653).

13312891 is a wasteful number, since it uses less digits than its factorization.

13312891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721.

The product of its digits is 1296, while the sum is 28.

The square root of 13312891 is about 3648.6834611953. The cubic root of 13312891 is about 237.0049729828.

The spelling of 13312891 in words is "thirteen million, three hundred twelve thousand, eight hundred ninety-one".