13664251 has 2 divisors, whose sum is σ = 13664252. Its totient is φ = 13664250.

The previous prime is 13664237. The next prime is 13664257. The reversal of 13664251 is 15246631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13664251 - 2⁵ = 13664219 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13664257) 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, 6832125 + 6832126.

It is an arithmetic number, because the mean of its divisors is an integer number (6832126).

Almost surely, 2^13664251 is an apocalyptic number.

13664251 is a deficient number, since it is larger than the sum of its proper divisors (1).

13664251 is an equidigital number, since it uses as much as digits as its factorization.

13664251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 13664251 is about 3696.5187677056. The cubic root of 13664251 is about 239.0719425350.

The spelling of 13664251 in words is "thirteen million, six hundred sixty-four thousand, two hundred fifty-one".