13081919 has 2 divisors, whose sum is σ = 13081920. Its totient is φ = 13081918.

The previous prime is 13081909. The next prime is 13081931. The reversal of 13081919 is 91918031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13081919 - 2⁴ = 13081903 is a prime.

It is a super-2 number, since 2×13081919² = 342273209445122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13081909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6540959 + 6540960.

It is an arithmetic number, because the mean of its divisors is an integer number (6540960).

Almost surely, 2^13081919 is an apocalyptic number.

13081919 is a deficient number, since it is larger than the sum of its proper divisors (1).

13081919 is an equidigital number, since it uses as much as digits as its factorization.

13081919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 13081919 is about 3616.8935566312. The cubic root of 13081919 is about 235.6263298056.

The spelling of 13081919 in words is "thirteen million, eighty-one thousand, nine hundred nineteen".