136919173 has 4 divisors (see below), whose sum is σ = 144973260. Its totient is φ = 128865088.

The previous prime is 136919147. The next prime is 136919177. The reversal of 136919173 is 371919631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371919631 = 97 ⋅3834223.

It can be written as a sum of positive squares in 2 ways, for example, as 38155329 + 98763844 = 6177^2 + 9938^2 .

It is a cyclic number.

It is not a de Polignac number, because 136919173 - 2⁵ = 136919141 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136919177) 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, 4027018 + ... + 4027051.

It is an arithmetic number, because the mean of its divisors is an integer number (36243315).

Almost surely, 2^136919173 is an apocalyptic number.

It is an amenable number.

136919173 is a deficient number, since it is larger than the sum of its proper divisors (8054087).

136919173 is an equidigital number, since it uses as much as digits as its factorization.

136919173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054086.

The product of its digits is 30618, while the sum is 40.

The square root of 136919173 is about 11701.2466429864. The cubic root of 136919173 is about 515.4122730107.

The spelling of 136919173 in words is "one hundred thirty-six million, nine hundred nineteen thousand, one hundred seventy-three".