136672139 has 2 divisors, whose sum is σ = 136672140. Its totient is φ = 136672138.

The previous prime is 136672121. The next prime is 136672171. The reversal of 136672139 is 931276631.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136672139 - 2²⁰ = 135623563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136672439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68336069 + 68336070.

It is an arithmetic number, because the mean of its divisors is an integer number (68336070).

Almost surely, 2^136672139 is an apocalyptic number.

136672139 is a deficient number, since it is larger than the sum of its proper divisors (1).

136672139 is an equidigital number, since it uses as much as digits as its factorization.

136672139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 136672139 is about 11690.6859935591. The cubic root of 136672139 is about 515.1021119043.

The spelling of 136672139 in words is "one hundred thirty-six million, six hundred seventy-two thousand, one hundred thirty-nine".