12787397 has 4 divisors (see below), whose sum is σ = 14614176. Its totient is φ = 10960620.

The previous prime is 12787393. The next prime is 12787409. The reversal of 12787397 is 79378721.

12787397 is digitally balanced in base 2, because in such base 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 12787397 - 2² = 12787393 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 (12787391) 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, 913379 + ... + 913392.

It is an arithmetic number, because the mean of its divisors is an integer number (3653544).

Almost surely, 2^12787397 is an apocalyptic number.

It is an amenable number.

12787397 is a deficient number, since it is larger than the sum of its proper divisors (1826779).

12787397 is an equidigital number, since it uses as much as digits as its factorization.

12787397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826778.

The product of its digits is 148176, while the sum is 44.

The square root of 12787397 is about 3575.9470074373. The cubic root of 12787397 is about 233.8446201051.

The spelling of 12787397 in words is "twelve million, seven hundred eighty-seven thousand, three hundred ninety-seven".