136549949 has 4 divisors (see below), whose sum is σ = 136574364. Its totient is φ = 136525536.

The previous prime is 136549937. The next prime is 136549957. The reversal of 136549949 is 949945631.

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 84088900 + 52461049 = 9170^2 + 7243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136549949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 136549897 and 136549906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136549249) 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, 809 + ... + 16545.

It is an arithmetic number, because the mean of its divisors is an integer number (34143591).

Almost surely, 2^136549949 is an apocalyptic number.

It is an amenable number.

136549949 is a deficient number, since it is larger than the sum of its proper divisors (24415).

136549949 is an equidigital number, since it uses as much as digits as its factorization.

136549949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24414.

The product of its digits is 1049760, while the sum is 50.

The square root of 136549949 is about 11685.4588698947. The cubic root of 136549949 is about 514.9485592885.

The spelling of 136549949 in words is "one hundred thirty-six million, five hundred forty-nine thousand, nine hundred forty-nine".