12909993 has 8 divisors (see below), whose sum is σ = 17266656. Its totient is φ = 8580000.

The previous prime is 12909989. The next prime is 12909997. The reversal of 12909993 is 39990921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12909989) and next prime (12909997).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12909993 - 2² = 12909989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12909997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5508 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (2158332).

Almost surely, 2^12909993 is an apocalyptic number.

It is an amenable number.

12909993 is a deficient number, since it is larger than the sum of its proper divisors (4356663).

12909993 is a wasteful number, since it uses less digits than its factorization.

12909993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13335.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 12909993 is about 3593.0478705411. The cubic root of 12909993 is about 234.5895536470.

The spelling of 12909993 in words is "twelve million, nine hundred nine thousand, nine hundred ninety-three".