13899257 has 2 divisors, whose sum is σ = 13899258. Its totient is φ = 13899256.

The previous prime is 13899247. The next prime is 13899269. The reversal of 13899257 is 75299831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13808656 + 90601 = 3716^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 13899257 - 2⁸ = 13899001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13899247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6949628 + 6949629.

It is an arithmetic number, because the mean of its divisors is an integer number (6949629).

Almost surely, 2^13899257 is an apocalyptic number.

It is an amenable number.

13899257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13899257 is an equidigital number, since it uses as much as digits as its factorization.

13899257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 13899257 is about 3728.1707310691. The cubic root of 13899257 is about 240.4347271222.

The spelling of 13899257 in words is "thirteen million, eight hundred ninety-nine thousand, two hundred fifty-seven".