13239949 has 2 divisors, whose sum is σ = 13239950. Its totient is φ = 13239948.

The previous prime is 13239943. The next prime is 13239997. The reversal of 13239949 is 94993231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12299049 + 940900 = 3507^2 + 970^2 .

It is an emirp because it is prime and its reverse (94993231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13239949 - 2⁹ = 13239437 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 (13239943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619974 + 6619975.

It is an arithmetic number, because the mean of its divisors is an integer number (6619975).

Almost surely, 2^13239949 is an apocalyptic number.

It is an amenable number.

13239949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13239949 is an equidigital number, since it uses as much as digits as its factorization.

13239949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 40.

The square root of 13239949 is about 3638.6740716915. The cubic root of 13239949 is about 236.5713259651.

The spelling of 13239949 in words is "thirteen million, two hundred thirty-nine thousand, nine hundred forty-nine".