136891323 has 8 divisors (see below), whose sum is σ = 202802000. Its totient is φ = 91260864.

The previous prime is 136891309. The next prime is 136891351. The reversal of 136891323 is 323198631.

136891323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136891323 - 2²¹ = 134794171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136891723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534998 + ... + 2535051.

It is an arithmetic number, because the mean of its divisors is an integer number (25350250).

Almost surely, 2^136891323 is an apocalyptic number.

136891323 is a deficient number, since it is larger than the sum of its proper divisors (65910677).

136891323 is an equidigital number, since it uses as much as digits as its factorization.

136891323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070058 (or 5070052 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 136891323 is about 11700.0565383249. The cubic root of 136891323 is about 515.3773248856.

The spelling of 136891323 in words is "one hundred thirty-six million, eight hundred ninety-one thousand, three hundred twenty-three".