136571137 has 4 divisors (see below), whose sum is σ = 136895956. Its totient is φ = 136246320.

The previous prime is 136571129. The next prime is 136571147. The reversal of 136571137 is 731175631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731175631 = 149 ⋅4907219.

It can be written as a sum of positive squares in 2 ways, for example, as 25816561 + 110754576 = 5081^2 + 10524^2 .

It is a cyclic number.

It is not a de Polignac number, because 136571137 - 2³ = 136571129 is a prime.

It is a super-2 number, since 2×136571137² = 37303350922945538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136571117) 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, 161778 + ... + 162619.

It is an arithmetic number, because the mean of its divisors is an integer number (34223989).

Almost surely, 2^136571137 is an apocalyptic number.

It is an amenable number.

136571137 is a deficient number, since it is larger than the sum of its proper divisors (324819).

136571137 is an equidigital number, since it uses as much as digits as its factorization.

136571137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324818.

The product of its digits is 13230, while the sum is 34.

The square root of 136571137 is about 11686.3654315617. The cubic root of 136571137 is about 514.9751921943.

The spelling of 136571137 in words is "one hundred thirty-six million, five hundred seventy-one thousand, one hundred thirty-seven".