136782009 has 72 divisors (see below), whose sum is σ = 253506240. Its totient is φ = 69503616.

The previous prime is 136781999. The next prime is 136782031. The reversal of 136782009 is 900287631.

It is not a de Polignac number, because 136782009 - 2⁹ = 136781497 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (136786009) 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 71 ways as a sum of consecutive naturals, for example, 308542 + ... + 308984.

It is an arithmetic number, because the mean of its divisors is an integer number (3520920).

Almost surely, 2^136782009 is an apocalyptic number.

It is an amenable number.

136782009 is a deficient number, since it is larger than the sum of its proper divisors (116724231).

136782009 is a wasteful number, since it uses less digits than its factorization.

136782009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 136782009 is about 11695.3840894603. The cubic root of 136782009 is about 515.2401042095.

The spelling of 136782009 in words is "one hundred thirty-six million, seven hundred eighty-two thousand, nine".