136252729 has 4 divisors (see below), whose sum is σ = 136424484. Its totient is φ = 136080976.

The previous prime is 136252723. The next prime is 136252751. The reversal of 136252729 is 927252631.

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 27092025 + 109160704 = 5205^2 + 10448^2 .

It is a cyclic number.

It is not a de Polignac number, because 136252729 - 2⁷ = 136252601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136252723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84682 + ... + 86275.

It is an arithmetic number, because the mean of its divisors is an integer number (34106121).

Almost surely, 2^136252729 is an apocalyptic number.

It is an amenable number.

136252729 is a deficient number, since it is larger than the sum of its proper divisors (171755).

136252729 is an equidigital number, since it uses as much as digits as its factorization.

136252729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171754.

The product of its digits is 45360, while the sum is 37.

The square root of 136252729 is about 11672.7344268599. The cubic root of 136252729 is about 514.5746687733.

The spelling of 136252729 in words is "one hundred thirty-six million, two hundred fifty-two thousand, seven hundred twenty-nine".