197172211 has 2 divisors, whose sum is σ = 197172212. Its totient is φ = 197172210.

The previous prime is 197172187. The next prime is 197172251. The reversal of 197172211 is 112271791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197172211 - 2²⁷ = 62954483 is a prime.

It is not a weakly prime, because it can be changed into another prime (197172251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98586105 + 98586106.

It is an arithmetic number, because the mean of its divisors is an integer number (98586106).

Almost surely, 2^197172211 is an apocalyptic number.

197172211 is a deficient number, since it is larger than the sum of its proper divisors (1).

197172211 is an equidigital number, since it uses as much as digits as its factorization.

197172211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 31.

The square root of 197172211 is about 14041.8022703640. The cubic root of 197172211 is about 582.0342864667.

The spelling of 197172211 in words is "one hundred ninety-seven million, one hundred seventy-two thousand, two hundred eleven".