197112917 has 2 divisors, whose sum is σ = 197112918. Its totient is φ = 197112916.

The previous prime is 197112907. The next prime is 197112991. The reversal of 197112917 is 719211791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137499076 + 59613841 = 11726^2 + 7721^2 .

It is a cyclic number.

It is not a de Polignac number, because 197112917 - 2⁴ = 197112901 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 (197112907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98556458 + 98556459.

It is an arithmetic number, because the mean of its divisors is an integer number (98556459).

Almost surely, 2^197112917 is an apocalyptic number.

It is an amenable number.

197112917 is a deficient number, since it is larger than the sum of its proper divisors (1).

197112917 is an equidigital number, since it uses as much as digits as its factorization.

197112917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938, while the sum is 38.

The square root of 197112917 is about 14039.6907729480. The cubic root of 197112917 is about 581.9759371337.

The spelling of 197112917 in words is "one hundred ninety-seven million, one hundred twelve thousand, nine hundred seventeen".