13997519 has 2 divisors, whose sum is σ = 13997520. Its totient is φ = 13997518.

The previous prime is 13997497. The next prime is 13997537. The reversal of 13997519 is 91579931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13997519 is a prime.

It is a super-2 number, since 2×13997519² = 391861076310722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13997519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13997539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6998759 + 6998760.

It is an arithmetic number, because the mean of its divisors is an integer number (6998760).

Almost surely, 2^13997519 is an apocalyptic number.

13997519 is a deficient number, since it is larger than the sum of its proper divisors (1).

13997519 is an equidigital number, since it uses as much as digits as its factorization.

13997519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 44.

The square root of 13997519 is about 3741.3258345137. The cubic root of 13997519 is about 240.9999885218. Note that the first 4 decimals are identical.

The spelling of 13997519 in words is "thirteen million, nine hundred ninety-seven thousand, five hundred nineteen".