136311239 has 2 divisors, whose sum is σ = 136311240. Its totient is φ = 136311238.

The previous prime is 136311211. The next prime is 136311251. The reversal of 136311239 is 932113631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136311239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136311209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68155619 + 68155620.

It is an arithmetic number, because the mean of its divisors is an integer number (68155620).

Almost surely, 2^136311239 is an apocalyptic number.

136311239 is a deficient number, since it is larger than the sum of its proper divisors (1).

136311239 is an equidigital number, since it uses as much as digits as its factorization.

136311239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 136311239 is about 11675.2404257900. The cubic root of 136311239 is about 514.6483148951.

The spelling of 136311239 in words is "one hundred thirty-six million, three hundred eleven thousand, two hundred thirty-nine".