12019997 has 8 divisors (see below), whose sum is σ = 13241280. Its totient is φ = 10821180.

The previous prime is 12019993. The next prime is 12020051. The reversal of 12019997 is 79991021.

It is not a de Polignac number, because 12019997 - 2² = 12019993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12019997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12019993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116648 + ... + 116750.

It is an arithmetic number, because the mean of its divisors is an integer number (1655160).

Almost surely, 2^12019997 is an apocalyptic number.

It is an amenable number.

12019997 is a deficient number, since it is larger than the sum of its proper divisors (1221283).

12019997 is an frugal number, since it uses more digits than its factorization.

12019997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 12019997 is about 3466.9867320196. The cubic root of 12019997 is about 229.0699493286.

The spelling of 12019997 in words is "twelve million, nineteen thousand, nine hundred ninety-seven".