136145909 has 2 divisors, whose sum is σ = 136145910. Its totient is φ = 136145908.

The previous prime is 136145899. The next prime is 136145917. The reversal of 136145909 is 909541631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103083409 + 33062500 = 10153^2 + 5750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136145909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136145939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68072954 + 68072955.

It is an arithmetic number, because the mean of its divisors is an integer number (68072955).

Almost surely, 2^136145909 is an apocalyptic number.

It is an amenable number.

136145909 is a deficient number, since it is larger than the sum of its proper divisors (1).

136145909 is an equidigital number, since it uses as much as digits as its factorization.

136145909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 136145909 is about 11668.1579094560. The cubic root of 136145909 is about 514.4401607964.

The spelling of 136145909 in words is "one hundred thirty-six million, one hundred forty-five thousand, nine hundred nine".