197983843 has 2 divisors, whose sum is σ = 197983844. Its totient is φ = 197983842.

The previous prime is 197983829. The next prime is 197983867. The reversal of 197983843 is 348389791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197983843 - 2¹⁷ = 197852771 is a prime.

It is not a weakly prime, because it can be changed into another prime (197983823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98991921 + 98991922.

It is an arithmetic number, because the mean of its divisors is an integer number (98991922).

Almost surely, 2^197983843 is an apocalyptic number.

197983843 is a deficient number, since it is larger than the sum of its proper divisors (1).

197983843 is an equidigital number, since it uses as much as digits as its factorization.

197983843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 197983843 is about 14070.6731537620. The cubic root of 197983843 is about 582.8318142411.

The spelling of 197983843 in words is "one hundred ninety-seven million, nine hundred eighty-three thousand, eight hundred forty-three".