13397391 has 24 divisors (see below), whose sum is σ = 22882080. Its totient is φ = 7390656.

The previous prime is 13397383. The next prime is 13397399. The reversal of 13397391 is 19379331.

It is an interprime number because it is at equal distance from previous prime (13397383) and next prime (13397399).

It is not a de Polignac number, because 13397391 - 2³ = 13397383 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13397399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1840 + ... + 5493.

It is an arithmetic number, because the mean of its divisors is an integer number (953420).

Almost surely, 2^13397391 is an apocalyptic number.

13397391 is a deficient number, since it is larger than the sum of its proper divisors (9484689).

13397391 is a wasteful number, since it uses less digits than its factorization.

13397391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375 (or 7372 counting only the distinct ones).

The product of its digits is 15309, while the sum is 36.

The square root of 13397391 is about 3660.2446639535. The cubic root of 13397391 is about 237.5053575892.

The spelling of 13397391 in words is "thirteen million, three hundred ninety-seven thousand, three hundred ninety-one".