136149771 has 4 divisors (see below), whose sum is σ = 181533032. Its totient is φ = 90766512.

The previous prime is 136149733. The next prime is 136149779. The reversal of 136149771 is 177941631.

136149771 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 not a de Polignac number, because 136149771 - 2⁶ = 136149707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136149779) 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, 22691626 + ... + 22691631.

It is an arithmetic number, because the mean of its divisors is an integer number (45383258).

Almost surely, 2^136149771 is an apocalyptic number.

136149771 is a deficient number, since it is larger than the sum of its proper divisors (45383261).

136149771 is an equidigital number, since it uses as much as digits as its factorization.

136149771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45383260.

The product of its digits is 31752, while the sum is 39.

The square root of 136149771 is about 11668.3234014146. The cubic root of 136149771 is about 514.4450250608.

The spelling of 136149771 in words is "one hundred thirty-six million, one hundred forty-nine thousand, seven hundred seventy-one".