197490211 has 2 divisors, whose sum is σ = 197490212. Its totient is φ = 197490210.

The previous prime is 197490151. The next prime is 197490217. The reversal of 197490211 is 112094791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197490211 - 2²¹ = 195393059 is a prime.

It is not a weakly prime, because it can be changed into another prime (197490217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98745105 + 98745106.

It is an arithmetic number, because the mean of its divisors is an integer number (98745106).

Almost surely, 2^197490211 is an apocalyptic number.

197490211 is a deficient number, since it is larger than the sum of its proper divisors (1).

197490211 is an equidigital number, since it uses as much as digits as its factorization.

197490211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 197490211 is about 14053.1210412492. The cubic root of 197490211 is about 582.3470206806.

The spelling of 197490211 in words is "one hundred ninety-seven million, four hundred ninety thousand, two hundred eleven".