197422091 has 2 divisors, whose sum is σ = 197422092. Its totient is φ = 197422090.

The previous prime is 197422061. The next prime is 197422151. The reversal of 197422091 is 190224791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197422091 - 2¹⁴ = 197405707 is a prime.

It is not a weakly prime, because it can be changed into another prime (197422021) 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, 98711045 + 98711046.

It is an arithmetic number, because the mean of its divisors is an integer number (98711046).

Almost surely, 2^197422091 is an apocalyptic number.

197422091 is a deficient number, since it is larger than the sum of its proper divisors (1).

197422091 is an equidigital number, since it uses as much as digits as its factorization.

197422091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 197422091 is about 14050.6971713150. The cubic root of 197422091 is about 582.2800569549.

The spelling of 197422091 in words is "one hundred ninety-seven million, four hundred twenty-two thousand, ninety-one".