13239691 has 2 divisors, whose sum is σ = 13239692. Its totient is φ = 13239690.

The previous prime is 13239671. The next prime is 13239703. The reversal of 13239691 is 19693231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13239691 - 2¹⁹ = 12715403 is a prime.

It is a super-3 number, since 3×13239691³ (a number of 22 digits) contains 333 as substring.

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, 6619845 + 6619846.

It is an arithmetic number, because the mean of its divisors is an integer number (6619846).

Almost surely, 2^13239691 is an apocalyptic number.

13239691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13239691 is an equidigital number, since it uses as much as digits as its factorization.

13239691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 34.

The square root of 13239691 is about 3638.6386190442. The cubic root of 13239691 is about 236.5697893076.

The spelling of 13239691 in words is "thirteen million, two hundred thirty-nine thousand, six hundred ninety-one".