136664973 has 12 divisors (see below), whose sum is σ = 197799420. Its totient is φ = 90927936.

The previous prime is 136664971. The next prime is 136664981. The reversal of 136664973 is 379466631.

It can be written as a sum of positive squares in 2 ways, for example, as 86155524 + 50509449 = 9282^2 + 7107^2 .

It is not a de Polignac number, because 136664973 - 2¹ = 136664971 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136664971) 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 11 ways as a sum of consecutive naturals, for example, 10336 + ... + 19497.

It is an arithmetic number, because the mean of its divisors is an integer number (16483285).

Almost surely, 2^136664973 is an apocalyptic number.

It is an amenable number.

136664973 is a deficient number, since it is larger than the sum of its proper divisors (61134447).

136664973 is a wasteful number, since it uses less digits than its factorization.

136664973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30348 (or 30345 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 136664973 is about 11690.3795062436. The cubic root of 136664973 is about 515.0931091276.

The spelling of 136664973 in words is "one hundred thirty-six million, six hundred sixty-four thousand, nine hundred seventy-three".