136299791 has 4 divisors (see below), whose sum is σ = 136765272. Its totient is φ = 135834312.

The previous prime is 136299781. The next prime is 136299811. The reversal of 136299791 is 197992631.

136299791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136299791 - 2¹⁸ = 136037647 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 (136299731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232301 + ... + 232886.

It is an arithmetic number, because the mean of its divisors is an integer number (34191318).

Almost surely, 2^136299791 is an apocalyptic number.

136299791 is a deficient number, since it is larger than the sum of its proper divisors (465481).

136299791 is an equidigital number, since it uses as much as digits as its factorization.

136299791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465480.

The product of its digits is 183708, while the sum is 47.

The square root of 136299791 is about 11674.7501472194. The cubic root of 136299791 is about 514.6339070373.

The spelling of 136299791 in words is "one hundred thirty-six million, two hundred ninety-nine thousand, seven hundred ninety-one".