136289929 has 4 divisors (see below), whose sum is σ = 137284884. Its totient is φ = 135294976.

The previous prime is 136289899. The next prime is 136289939. The reversal of 136289929 is 929982631.

136289929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40347904 + 95942025 = 6352^2 + 9795^2 .

It is a cyclic number.

It is not a de Polignac number, because 136289929 - 2²¹ = 134192777 is a prime.

It is a Smith number, since the sum of its digits (49) 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 not an unprimeable number, because it can be changed into a prime (136289939) 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, 497272 + ... + 497545.

It is an arithmetic number, because the mean of its divisors is an integer number (34321221).

Almost surely, 2^136289929 is an apocalyptic number.

It is an amenable number.

136289929 is a deficient number, since it is larger than the sum of its proper divisors (994955).

136289929 is an equidigital number, since it uses as much as digits as its factorization.

136289929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994954.

The product of its digits is 419904, while the sum is 49.

The square root of 136289929 is about 11674.3277750798. The cubic root of 136289929 is about 514.6214945898.

The spelling of 136289929 in words is "one hundred thirty-six million, two hundred eighty-nine thousand, nine hundred twenty-nine".