197199943 has 2 divisors, whose sum is σ = 197199944. Its totient is φ = 197199942.

The previous prime is 197199911. The next prime is 197199991. The reversal of 197199943 is 349991791.

It is a weak prime.

It is an emirp because it is prime and its reverse (349991791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197199943 - 2⁵ = 197199911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197199143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98599971 + 98599972.

It is an arithmetic number, because the mean of its divisors is an integer number (98599972).

Almost surely, 2^197199943 is an apocalyptic number.

197199943 is a deficient number, since it is larger than the sum of its proper divisors (1).

197199943 is an equidigital number, since it uses as much as digits as its factorization.

197199943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 52.

The square root of 197199943 is about 14042.7897157224. The cubic root of 197199943 is about 582.0615726278.

The spelling of 197199943 in words is "one hundred ninety-seven million, one hundred ninety-nine thousand, nine hundred forty-three".