12197919 has 4 divisors (see below), whose sum is σ = 16263896. Its totient is φ = 8131944.

The previous prime is 12197917. The next prime is 12197921. The reversal of 12197919 is 91979121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12197917) and next prime (12197921).

It is not a de Polignac number, because 12197919 - 2¹ = 12197917 is a prime.

It is a super-2 number, since 2×12197919² = 297578455861122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12197917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032984 + ... + 2032989.

It is an arithmetic number, because the mean of its divisors is an integer number (4065974).

Almost surely, 2^12197919 is an apocalyptic number.

12197919 is a deficient number, since it is larger than the sum of its proper divisors (4065977).

12197919 is an equidigital number, since it uses as much as digits as its factorization.

12197919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065976.

The product of its digits is 10206, while the sum is 39.

The square root of 12197919 is about 3492.5519323268. The cubic root of 12197919 is about 230.1946619173.

The spelling of 12197919 in words is "twelve million, one hundred ninety-seven thousand, nine hundred nineteen".