197185973 has 2 divisors, whose sum is σ = 197185974. Its totient is φ = 197185972.

The previous prime is 197185951. The next prime is 197185979. The reversal of 197185973 is 379581791.

197185973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196056004 + 1129969 = 14002^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 197185973 - 2⁶ = 197185909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197185979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98592986 + 98592987.

It is an arithmetic number, because the mean of its divisors is an integer number (98592987).

Almost surely, 2^197185973 is an apocalyptic number.

It is an amenable number.

197185973 is a deficient number, since it is larger than the sum of its proper divisors (1).

197185973 is an equidigital number, since it uses as much as digits as its factorization.

197185973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 50.

The square root of 197185973 is about 14042.2922986242. The cubic root of 197185973 is about 582.0478275390.

The spelling of 197185973 in words is "one hundred ninety-seven million, one hundred eighty-five thousand, nine hundred seventy-three".