13249997 has 2 divisors, whose sum is σ = 13249998. Its totient is φ = 13249996.

The previous prime is 13249967. The next prime is 13250009. The reversal of 13249997 is 79994231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7557001 + 5692996 = 2749^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 13249997 - 2⁶ = 13249933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13249937) 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, 6624998 + 6624999.

It is an arithmetic number, because the mean of its divisors is an integer number (6624999).

Almost surely, 2^13249997 is an apocalyptic number.

It is an amenable number.

13249997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13249997 is an equidigital number, since it uses as much as digits as its factorization.

13249997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 13249997 is about 3640.0545325585. The cubic root of 13249997 is about 236.6311566992.

The spelling of 13249997 in words is "thirteen million, two hundred forty-nine thousand, nine hundred ninety-seven".