12928197 has 4 divisors (see below), whose sum is σ = 17237600. Its totient is φ = 8618796.

The previous prime is 12928193. The next prime is 12928213. The reversal of 12928197 is 79182921.

12928197 is digitally balanced in base 3, 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 not a de Polignac number, because 12928197 - 2² = 12928193 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 (12928193) 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, 2154697 + ... + 2154702.

It is an arithmetic number, because the mean of its divisors is an integer number (4309400).

Almost surely, 2^12928197 is an apocalyptic number.

It is an amenable number.

12928197 is a deficient number, since it is larger than the sum of its proper divisors (4309403).

12928197 is an equidigital number, since it uses as much as digits as its factorization.

12928197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309402.

The product of its digits is 18144, while the sum is 39.

The square root of 12928197 is about 3595.5802035277. The cubic root of 12928197 is about 234.6997644629.

The spelling of 12928197 in words is "twelve million, nine hundred twenty-eight thousand, one hundred ninety-seven".