13308257 has 2 divisors, whose sum is σ = 13308258. Its totient is φ = 13308256.

The previous prime is 13308241. The next prime is 13308289. The reversal of 13308257 is 75280331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 341056 = 3601^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 13308257 - 2⁴ = 13308241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13308157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6654128 + 6654129.

It is an arithmetic number, because the mean of its divisors is an integer number (6654129).

Almost surely, 2^13308257 is an apocalyptic number.

It is an amenable number.

13308257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13308257 is an equidigital number, since it uses as much as digits as its factorization.

13308257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 13308257 is about 3648.0483823546. The cubic root of 13308257 is about 236.9774706043.

Adding to 13308257 its reverse (75280331), we get a palindrome (88588588).

The spelling of 13308257 in words is "thirteen million, three hundred eight thousand, two hundred fifty-seven".