12789997 has 4 divisors (see below), whose sum is σ = 13952736. Its totient is φ = 11627260.

The previous prime is 12789979. The next prime is 12790007. The reversal of 12789997 is 79998721.

12789997 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12789997 - 2¹⁹ = 12265709 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 (12789947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581353 + ... + 581374.

It is an arithmetic number, because the mean of its divisors is an integer number (3488184).

Almost surely, 2^12789997 is an apocalyptic number.

It is an amenable number.

12789997 is a deficient number, since it is larger than the sum of its proper divisors (1162739).

12789997 is a wasteful number, since it uses less digits than its factorization.

12789997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162738.

The product of its digits is 571536, while the sum is 52.

The square root of 12789997 is about 3576.3105290229. The cubic root of 12789997 is about 233.8604678655.

The spelling of 12789997 in words is "twelve million, seven hundred eighty-nine thousand, nine hundred ninety-seven".