13219391 has 2 divisors, whose sum is σ = 13219392. Its totient is φ = 13219390.

The previous prime is 13219379. The next prime is 13219399. The reversal of 13219391 is 19391231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13219391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13219399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6609695 + 6609696.

It is an arithmetic number, because the mean of its divisors is an integer number (6609696).

Almost surely, 2^13219391 is an apocalyptic number.

13219391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13219391 is an equidigital number, since it uses as much as digits as its factorization.

13219391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 29.

The square root of 13219391 is about 3635.8480441295. The cubic root of 13219391 is about 236.4488191316.

The spelling of 13219391 in words is "thirteen million, two hundred nineteen thousand, three hundred ninety-one".