197952871 has 2 divisors, whose sum is σ = 197952872. Its totient is φ = 197952870.

The previous prime is 197952857. The next prime is 197952883. The reversal of 197952871 is 178259791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197952871 - 2²¹ = 195855719 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197952841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98976435 + 98976436.

It is an arithmetic number, because the mean of its divisors is an integer number (98976436).

Almost surely, 2^197952871 is an apocalyptic number.

197952871 is a deficient number, since it is larger than the sum of its proper divisors (1).

197952871 is an equidigital number, since it uses as much as digits as its factorization.

197952871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 49.

The square root of 197952871 is about 14069.5725237123. The cubic root of 197952871 is about 582.8014205011.

The spelling of 197952871 in words is "one hundred ninety-seven million, nine hundred fifty-two thousand, eight hundred seventy-one".