43197986 has 24 divisors (see below), whose sum is σ = 74140500. Its totient is φ = 18761472.

The previous prime is 43197961. The next prime is 43197989. The reversal of 43197986 is 68979134.

It can be written as a sum of positive squares in 6 ways, for example, as 12117361 + 31080625 = 3481^2 + 5575^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 43197986.

It is not an unprimeable number, because it can be changed into a prime (43197989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4640 + ... + 10388.

Almost surely, 2^43197986 is an apocalyptic number.

43197986 is a deficient number, since it is larger than the sum of its proper divisors (30942514).

43197986 is a wasteful number, since it uses less digits than its factorization.

43197986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5798 (or 5781 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 43197986 is about 6572.5174781053. The cubic root of 43197986 is about 350.8766757492.

The spelling of 43197986 in words is "forty-three million, one hundred ninety-seven thousand, nine hundred eighty-six".