197212871 has 2 divisors, whose sum is σ = 197212872. Its totient is φ = 197212870.

The previous prime is 197212861. The next prime is 197212901. The reversal of 197212871 is 178212791.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197212871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197212861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98606435 + 98606436.

It is an arithmetic number, because the mean of its divisors is an integer number (98606436).

Almost surely, 2^197212871 is an apocalyptic number.

197212871 is a deficient number, since it is larger than the sum of its proper divisors (1).

197212871 is an equidigital number, since it uses as much as digits as its factorization.

197212871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 38.

The square root of 197212871 is about 14043.2500155769. The cubic root of 197212871 is about 582.0742919141.

The spelling of 197212871 in words is "one hundred ninety-seven million, two hundred twelve thousand, eight hundred seventy-one".