197166899 has 2 divisors, whose sum is σ = 197166900. Its totient is φ = 197166898.

The previous prime is 197166887. The next prime is 197166917. The reversal of 197166899 is 998661791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197166899 - 2⁴ = 197166883 is a prime.

It is a super-2 number, since 2×197166899² = 77749572122552402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197166199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98583449 + 98583450.

It is an arithmetic number, because the mean of its divisors is an integer number (98583450).

Almost surely, 2^197166899 is an apocalyptic number.

197166899 is a deficient number, since it is larger than the sum of its proper divisors (1).

197166899 is an equidigital number, since it uses as much as digits as its factorization.

197166899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 56.

The square root of 197166899 is about 14041.6131195814. The cubic root of 197166899 is about 582.0290595741.

The spelling of 197166899 in words is "one hundred ninety-seven million, one hundred sixty-six thousand, eight hundred ninety-nine".