133613239 has 2 divisors, whose sum is σ = 133613240. Its totient is φ = 133613238.

The previous prime is 133613231. The next prime is 133613257. The reversal of 133613239 is 932316331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133613239 - 2³ = 133613231 is a prime.

It is a super-2 number, since 2×133613239² = 35704995272142242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133613239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133613231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66806619 + 66806620.

It is an arithmetic number, because the mean of its divisors is an integer number (66806620).

Almost surely, 2^133613239 is an apocalyptic number.

133613239 is a deficient number, since it is larger than the sum of its proper divisors (1).

133613239 is an equidigital number, since it uses as much as digits as its factorization.

133613239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 31.

The square root of 133613239 is about 11559.1193003619. The cubic root of 133613239 is about 511.2301956489.

The spelling of 133613239 in words is "one hundred thirty-three million, six hundred thirteen thousand, two hundred thirty-nine".