13929287 has 2 divisors, whose sum is σ = 13929288. Its totient is φ = 13929286.

The previous prime is 13929281. The next prime is 13929317. The reversal of 13929287 is 78292931.

It is a happy number.

13929287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13929287 - 2⁴ = 13929271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13929281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6964643 + 6964644.

It is an arithmetic number, because the mean of its divisors is an integer number (6964644).

Almost surely, 2^13929287 is an apocalyptic number.

13929287 is a deficient number, since it is larger than the sum of its proper divisors (1).

13929287 is an equidigital number, since it uses as much as digits as its factorization.

13929287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 13929287 is about 3732.1960023557. The cubic root of 13929287 is about 240.6077594214.

The spelling of 13929287 in words is "thirteen million, nine hundred twenty-nine thousand, two hundred eighty-seven".