136172329 has 4 divisors (see below), whose sum is σ = 144182484. Its totient is φ = 128162176.

The previous prime is 136172303. The next prime is 136172347. The reversal of 136172329 is 923271631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923271631 = 15467 ⋅59693.

It can be written as a sum of positive squares in 2 ways, for example, as 111936400 + 24235929 = 10580^2 + 4923^2 .

It is a cyclic number.

It is not a de Polignac number, because 136172329 - 2⁹ = 136171817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136172294 and 136172303.

It is not an unprimeable number, because it can be changed into a prime (136172389) 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, 4005052 + ... + 4005085.

It is an arithmetic number, because the mean of its divisors is an integer number (36045621).

Almost surely, 2^136172329 is an apocalyptic number.

It is an amenable number.

136172329 is a deficient number, since it is larger than the sum of its proper divisors (8010155).

136172329 is an equidigital number, since it uses as much as digits as its factorization.

136172329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8010154.

The product of its digits is 13608, while the sum is 34.

The square root of 136172329 is about 11669.2899955396. The cubic root of 136172329 is about 514.4734354649.

The spelling of 136172329 in words is "one hundred thirty-six million, one hundred seventy-two thousand, three hundred twenty-nine".