13999519 has 2 divisors, whose sum is σ = 13999520. Its totient is φ = 13999518.

The previous prime is 13999481. The next prime is 13999529. The reversal of 13999519 is 91599931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13999519 is a prime.

It is a super-2 number, since 2×13999519² = 391973064462722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13999529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6999759 + 6999760.

It is an arithmetic number, because the mean of its divisors is an integer number (6999760).

Almost surely, 2^13999519 is an apocalyptic number.

13999519 is a deficient number, since it is larger than the sum of its proper divisors (1).

13999519 is an equidigital number, since it uses as much as digits as its factorization.

13999519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98415, while the sum is 46.

The square root of 13999519 is about 3741.5931098932. The cubic root of 13999519 is about 241.0114661992.

The spelling of 13999519 in words is "thirteen million, nine hundred ninety-nine thousand, five hundred nineteen".