12807997 has 4 divisors (see below), whose sum is σ = 12818176. Its totient is φ = 12797820.

The previous prime is 12807989. The next prime is 12808009. The reversal of 12807997 is 79970821.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12807997 - 2³ = 12807989 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 (12807497) 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, 2883 + ... + 5824.

It is an arithmetic number, because the mean of its divisors is an integer number (3204544).

Almost surely, 2^12807997 is an apocalyptic number.

It is an amenable number.

12807997 is a deficient number, since it is larger than the sum of its proper divisors (10179).

12807997 is an equidigital number, since it uses as much as digits as its factorization.

12807997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 12807997 is about 3578.8262042184. The cubic root of 12807997 is about 233.9701242692.

The spelling of 12807997 in words is "twelve million, eight hundred seven thousand, nine hundred ninety-seven".