136331329 has 4 divisors (see below), whose sum is σ = 136916676. Its totient is φ = 135745984.

The previous prime is 136331323. The next prime is 136331353. The reversal of 136331329 is 923133631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923133631 = 7 ⋅131876233.

It can be written as a sum of positive squares in 2 ways, for example, as 46991025 + 89340304 = 6855^2 + 9452^2 .

It is a cyclic number.

It is not a de Polignac number, because 136331329 - 2⁵ = 136331297 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a pancake number, because a pancake can be divided into 136331329 parts by 16512 straight cuts.

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 136331329.

It is not an unprimeable number, because it can be changed into a prime (136331323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292324 + ... + 292789.

It is an arithmetic number, because the mean of its divisors is an integer number (34229169).

Almost surely, 2^136331329 is an apocalyptic number.

It is an amenable number.

136331329 is a deficient number, since it is larger than the sum of its proper divisors (585347).

136331329 is an equidigital number, since it uses as much as digits as its factorization.

136331329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585346.

The product of its digits is 8748, while the sum is 31.

The square root of 136331329 is about 11676.1007618126. The cubic root of 136331329 is about 514.6735971751.

The spelling of 136331329 in words is "one hundred thirty-six million, three hundred thirty-one thousand, three hundred twenty-nine".