13619231 has 2 divisors, whose sum is σ = 13619232. Its totient is φ = 13619230.

The previous prime is 13619191. The next prime is 13619233. The reversal of 13619231 is 13291631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13619231 is a prime.

It is a super-2 number, since 2×13619231² = 370966906062722, which contains 22 as substring.

Together with 13619233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13619231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13619233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6809615 + 6809616.

It is an arithmetic number, because the mean of its divisors is an integer number (6809616).

Almost surely, 2^13619231 is an apocalyptic number.

13619231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13619231 is an equidigital number, since it uses as much as digits as its factorization.

13619231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 26.

The square root of 13619231 is about 3690.4242303562. The cubic root of 13619231 is about 238.8090945886.

The spelling of 13619231 in words is "thirteen million, six hundred nineteen thousand, two hundred thirty-one".