12699009 has 12 divisors (see below), whose sum is σ = 18484752. Its totient is φ = 8400600.

The previous prime is 12698999. The next prime is 12699023. The reversal of 12699009 is 90099621.

It is not a de Polignac number, because 12699009 - 2⁴ = 12698993 is a prime.

It is a super-2 number, since 2×12699009² = 322529659164162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12699079) 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, 4207 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (1540396).

Almost surely, 2^12699009 is an apocalyptic number.

It is an amenable number.

12699009 is a deficient number, since it is larger than the sum of its proper divisors (5785743).

12699009 is a wasteful number, since it uses less digits than its factorization.

12699009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10908 (or 10905 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 12699009 is about 3563.5668928757. The cubic root of 12699009 is about 233.3045867080.

The spelling of 12699009 in words is "twelve million, six hundred ninety-nine thousand, nine".