13919287 has 2 divisors, whose sum is σ = 13919288. Its totient is φ = 13919286.

The previous prime is 13919281. The next prime is 13919291. The reversal of 13919287 is 78291931.

13919287 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13919287 - 2¹⁵ = 13886519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13919281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6959643 + 6959644.

It is an arithmetic number, because the mean of its divisors is an integer number (6959644).

Almost surely, 2^13919287 is an apocalyptic number.

13919287 is a deficient number, since it is larger than the sum of its proper divisors (1).

13919287 is an equidigital number, since it uses as much as digits as its factorization.

13919287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 13919287 is about 3730.8560679823. The cubic root of 13919287 is about 240.5501672511.

The spelling of 13919287 in words is "thirteen million, nine hundred nineteen thousand, two hundred eighty-seven".