136391169 has 4 divisors (see below), whose sum is σ = 181854896. Its totient is φ = 90927444.

The previous prime is 136391159. The next prime is 136391179. The reversal of 136391169 is 961193631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (136391159) and next prime (136391179).

It is not a de Polignac number, because 136391169 - 2⁸ = 136390913 is a prime.

It is a super-2 number, since 2×136391169² = 37205101962373122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136391159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22731859 + ... + 22731864.

It is an arithmetic number, because the mean of its divisors is an integer number (45463724).

Almost surely, 2^136391169 is an apocalyptic number.

It is an amenable number.

136391169 is a deficient number, since it is larger than the sum of its proper divisors (45463727).

136391169 is an equidigital number, since it uses as much as digits as its factorization.

136391169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45463726.

The product of its digits is 26244, while the sum is 39.

The square root of 136391169 is about 11678.6629799819. The cubic root of 136391169 is about 514.7488881673.

The spelling of 136391169 in words is "one hundred thirty-six million, three hundred ninety-one thousand, one hundred sixty-nine".