72936909 has 24 divisors (see below), whose sum is σ = 110823360. Its totient is φ = 47409120.

The previous prime is 72936889. The next prime is 72936911. The reversal of 72936909 is 90963927.

It is not a de Polignac number, because 72936909 - 2¹⁵ = 72904141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72936949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44584 + ... + 46190.

It is an arithmetic number, because the mean of its divisors is an integer number (4617640).

Almost surely, 2^72936909 is an apocalyptic number.

It is an amenable number.

72936909 is a deficient number, since it is larger than the sum of its proper divisors (37886451).

72936909 is a wasteful number, since it uses less digits than its factorization.

72936909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 72936909 is about 8540.3108257253. The cubic root of 72936909 is about 417.8134837075.

The spelling of 72936909 in words is "seventy-two million, nine hundred thirty-six thousand, nine hundred nine".