13499257 has 2 divisors, whose sum is σ = 13499258. Its totient is φ = 13499256.

The previous prime is 13499237. The next prime is 13499261. The reversal of 13499257 is 75299431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 423801 = 3616^2 + 651^2 .

It is a cyclic number.

It is not a de Polignac number, because 13499257 - 2¹⁵ = 13466489 is a prime.

It is not a weakly prime, because it can be changed into another prime (13499237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6749628 + 6749629.

It is an arithmetic number, because the mean of its divisors is an integer number (6749629).

Almost surely, 2^13499257 is an apocalyptic number.

It is an amenable number.

13499257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13499257 is an equidigital number, since it uses as much as digits as its factorization.

13499257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 13499257 is about 3674.1335032903. The cubic root of 13499257 is about 238.1057894226.

The spelling of 13499257 in words is "thirteen million, four hundred ninety-nine thousand, two hundred fifty-seven".