136883909 has 2 divisors, whose sum is σ = 136883910. Its totient is φ = 136883908.

The previous prime is 136883897. The next prime is 136883917. The reversal of 136883909 is 909388631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94672900 + 42211009 = 9730^2 + 6497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136883909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136883209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68441954 + 68441955.

It is an arithmetic number, because the mean of its divisors is an integer number (68441955).

Almost surely, 2^136883909 is an apocalyptic number.

It is an amenable number.

136883909 is a deficient number, since it is larger than the sum of its proper divisors (1).

136883909 is an equidigital number, since it uses as much as digits as its factorization.

136883909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 136883909 is about 11699.7396979591. The cubic root of 136883909 is about 515.3680204817.

The spelling of 136883909 in words is "one hundred thirty-six million, eight hundred eighty-three thousand, nine hundred nine".