136258939 has 2 divisors, whose sum is σ = 136258940. Its totient is φ = 136258938.

The previous prime is 136258909. The next prime is 136258943. The reversal of 136258939 is 939852631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136258939 - 2¹¹ = 136256891 is a prime.

It is not a weakly prime, because it can be changed into another prime (136258909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68129469 + 68129470.

It is an arithmetic number, because the mean of its divisors is an integer number (68129470).

Almost surely, 2^136258939 is an apocalyptic number.

136258939 is a deficient number, since it is larger than the sum of its proper divisors (1).

136258939 is an equidigital number, since it uses as much as digits as its factorization.

136258939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 46.

The square root of 136258939 is about 11673.0004283389. Note that the first 3 decimals coincide. The cubic root of 136258939 is about 514.5824862562.

The spelling of 136258939 in words is "one hundred thirty-six million, two hundred fifty-eight thousand, nine hundred thirty-nine".