12197718 has 24 divisors (see below), whose sum is σ = 28461888. Its totient is φ = 3753072.

The previous prime is 12197701. The next prime is 12197723. The reversal of 12197718 is 81779121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25830 + ... + 26297.

It is an arithmetic number, because the mean of its divisors is an integer number (1185912).

Almost surely, 2^12197718 is an apocalyptic number.

12197718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12197718 is an abundant number, since it is smaller than the sum of its proper divisors (16264170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12197718 is a wasteful number, since it uses less digits than its factorization.

12197718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52148 (or 52145 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 12197718 is about 3492.5231566877. The cubic root of 12197718 is about 230.1933975109.

The spelling of 12197718 in words is "twelve million, one hundred ninety-seven thousand, seven hundred eighteen".