13239649 has 2 divisors, whose sum is σ = 13239650. Its totient is φ = 13239648.

The previous prime is 13239643. The next prime is 13239671. The reversal of 13239649 is 94693231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 2050624 = 3345^2 + 1432^2 .

It is a cyclic number.

It is not a de Polignac number, because 13239649 - 2³ = 13239641 is a prime.

It is not a weakly prime, because it can be changed into another prime (13239641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619824 + 6619825.

It is an arithmetic number, because the mean of its divisors is an integer number (6619825).

Almost surely, 2^13239649 is an apocalyptic number.

It is an amenable number.

13239649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13239649 is an equidigital number, since it uses as much as digits as its factorization.

13239649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 13239649 is about 3638.6328476503. The cubic root of 13239649 is about 236.5695391522.

The spelling of 13239649 in words is "thirteen million, two hundred thirty-nine thousand, six hundred forty-nine".