197212986 has 12 divisors (see below), whose sum is σ = 427294842. Its totient is φ = 65737656.

The previous prime is 197212969. The next prime is 197213011. The reversal of 197212986 is 689212791.

It can be written as a sum of positive squares in only one way, i.e., 196532361 + 680625 = 14019^2 + 825^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5478121 + ... + 5478156.

Almost surely, 2^197212986 is an apocalyptic number.

197212986 is an abundant number, since it is smaller than the sum of its proper divisors (230081856).

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

197212986 is a wasteful number, since it uses less digits than its factorization.

197212986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10956285 (or 10956282 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 197212986 is about 14043.2541100701. The cubic root of 197212986 is about 582.0744050550.

The spelling of 197212986 in words is "one hundred ninety-seven million, two hundred twelve thousand, nine hundred eighty-six".