12197689 has 4 divisors (see below), whose sum is σ = 13940224. Its totient is φ = 10455156.

The previous prime is 12197657. The next prime is 12197701. The reversal of 12197689 is 98679121.

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 an emirpimes, since its reverse is a distinct semiprime: 98679121 = 101 ⋅977021.

It is a cyclic number.

It is not a de Polignac number, because 12197689 - 2⁵ = 12197657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12197609) 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, 871257 + ... + 871270.

It is an arithmetic number, because the mean of its divisors is an integer number (3485056).

Almost surely, 2^12197689 is an apocalyptic number.

It is an amenable number.

12197689 is a deficient number, since it is larger than the sum of its proper divisors (1742535).

12197689 is an equidigital number, since it uses as much as digits as its factorization.

12197689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742534.

The product of its digits is 54432, while the sum is 43.

The square root of 12197689 is about 3492.5190049590. The cubic root of 12197689 is about 230.1932150829.

The spelling of 12197689 in words is "twelve million, one hundred ninety-seven thousand, six hundred eighty-nine".