13213391 has 2 divisors, whose sum is σ = 13213392. Its totient is φ = 13213390.

The previous prime is 13213363. The next prime is 13213399. The reversal of 13213391 is 19331231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13213391 - 2⁶ = 13213327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13213399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606695 + 6606696.

It is an arithmetic number, because the mean of its divisors is an integer number (6606696).

Almost surely, 2^13213391 is an apocalyptic number.

13213391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13213391 is an equidigital number, since it uses as much as digits as its factorization.

13213391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 23.

The square root of 13213391 is about 3635.0228334909. The cubic root of 13213391 is about 236.4130406904.

The spelling of 13213391 in words is "thirteen million, two hundred thirteen thousand, three hundred ninety-one".