12973509 has 12 divisors (see below), whose sum is σ = 18770752. Its totient is φ = 8634600.

The previous prime is 12973483. The next prime is 12973511. The reversal of 12973509 is 90537921.

It is not a de Polignac number, because 12973509 - 2⁸ = 12973253 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 (12973529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9924 + ... + 11154.

Almost surely, 2^12973509 is an apocalyptic number.

It is an amenable number.

12973509 is a deficient number, since it is larger than the sum of its proper divisors (5797243).

12973509 is a wasteful number, since it uses less digits than its factorization.

12973509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2405 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 12973509 is about 3601.8757613221. The cubic root of 12973509 is about 234.9736442451.

The spelling of 12973509 in words is "twelve million, nine hundred seventy-three thousand, five hundred nine".