13330391 has 4 divisors (see below), whose sum is σ = 13548984. Its totient is φ = 13111800.

The previous prime is 13330379. The next prime is 13330423. The reversal of 13330391 is 19303331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19303331 = 397 ⋅48623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13330391 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 (13330351) 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, 109205 + ... + 109326.

It is an arithmetic number, because the mean of its divisors is an integer number (3387246).

Almost surely, 2^13330391 is an apocalyptic number.

13330391 is a deficient number, since it is larger than the sum of its proper divisors (218593).

13330391 is an equidigital number, since it uses as much as digits as its factorization.

13330391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218592.

The product of its (nonzero) digits is 729, while the sum is 23.

The square root of 13330391 is about 3651.0807988868. The cubic root of 13330391 is about 237.1087764066.

The spelling of 13330391 in words is "thirteen million, three hundred thirty thousand, three hundred ninety-one".