136809911 has 24 divisors (see below), whose sum is σ = 167098464. Its totient is φ = 111471360.

The previous prime is 136809901. The next prime is 136809917. The reversal of 136809911 is 119908631.

It is not a de Polignac number, because 136809911 - 2⁶ = 136809847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136809917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262331 + ... + 262851.

It is an arithmetic number, because the mean of its divisors is an integer number (6962436).

Almost surely, 2^136809911 is an apocalyptic number.

136809911 is a deficient number, since it is larger than the sum of its proper divisors (30288553).

136809911 is a wasteful number, since it uses less digits than its factorization.

136809911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 136809911 is about 11696.5768924075. The cubic root of 136809911 is about 515.2751362337.

The spelling of 136809911 in words is "one hundred thirty-six million, eight hundred nine thousand, nine hundred eleven".