1997197182 has 32 divisors (see below), whose sum is σ = 4444796160. Its totient is φ = 664745400.

The previous prime is 1997197177. The next prime is 1997197193. The reversal of 1997197182 is 2817917991.

It is a super-2 number, since 2×1997197182² = 7977593167577482248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9807 + ... + 63957.

It is an arithmetic number, because the mean of its divisors is an integer number (138899880).

Almost surely, 2^1997197182 is an apocalyptic number.

1997197182 is an abundant number, since it is smaller than the sum of its proper divisors (2447598978).

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

1997197182 is a wasteful number, since it uses less digits than its factorization.

1997197182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54845 (or 54839 counting only the distinct ones).

The product of its digits is 571536, while the sum is 54.

The square root of 1997197182 is about 44690.0121056148. The cubic root of 1997197182 is about 1259.3322198457.

The spelling of 1997197182 in words is "one billion, nine hundred ninety-seven million, one hundred ninety-seven thousand, one hundred eighty-two".