197128973 has 2 divisors, whose sum is σ = 197128974. Its totient is φ = 197128972.

The previous prime is 197128927. The next prime is 197129017. The reversal of 197128973 is 379821791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111788329 + 85340644 = 10573^2 + 9238^2 .

It is an emirp because it is prime and its reverse (379821791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197128973 - 2¹⁰ = 197127949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197128903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98564486 + 98564487.

It is an arithmetic number, because the mean of its divisors is an integer number (98564487).

Almost surely, 2^197128973 is an apocalyptic number.

It is an amenable number.

197128973 is a deficient number, since it is larger than the sum of its proper divisors (1).

197128973 is an equidigital number, since it uses as much as digits as its factorization.

197128973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 47.

The square root of 197128973 is about 14040.2625687699. The cubic root of 197128973 is about 581.9917384860.

The spelling of 197128973 in words is "one hundred ninety-seven million, one hundred twenty-eight thousand, nine hundred seventy-three".