136649293 has 6 divisors (see below), whose sum is σ = 150201422. Its totient is φ = 124226520.

The previous prime is 136649243. The next prime is 136649299. The reversal of 136649293 is 392946631.

It can be written as a sum of positive squares in only one way, i.e., 132641289 + 4008004 = 11517^2 + 2002^2 .

It is not a de Polignac number, because 136649293 - 2⁹ = 136648781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136649299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564546 + ... + 564787.

Almost surely, 2^136649293 is an apocalyptic number.

It is an amenable number.

136649293 is a deficient number, since it is larger than the sum of its proper divisors (13552129).

136649293 is a wasteful number, since it uses less digits than its factorization.

136649293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129355 (or 1129344 counting only the distinct ones).

The product of its digits is 209952, while the sum is 43.

The square root of 136649293 is about 11689.7088500955. The cubic root of 136649293 is about 515.0734089594.

The spelling of 136649293 in words is "one hundred thirty-six million, six hundred forty-nine thousand, two hundred ninety-three".