136475729 has 4 divisors (see below), whose sum is σ = 146973876. Its totient is φ = 125977584.

The previous prime is 136475723. The next prime is 136475741. The reversal of 136475729 is 927574631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31618129 + 104857600 = 5623^2 + 10240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136475729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136475729.

It is not an unprimeable number, because it can be changed into a prime (136475723) 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, 5249054 + ... + 5249079.

It is an arithmetic number, because the mean of its divisors is an integer number (36743469).

Almost surely, 2^136475729 is an apocalyptic number.

It is an amenable number.

136475729 is a deficient number, since it is larger than the sum of its proper divisors (10498147).

136475729 is a wasteful number, since it uses less digits than its factorization.

136475729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10498146.

The product of its digits is 317520, while the sum is 44.

The square root of 136475729 is about 11682.2826964596. The cubic root of 136475729 is about 514.8552444514.

The spelling of 136475729 in words is "one hundred thirty-six million, four hundred seventy-five thousand, seven hundred twenty-nine".