201997073 has 2 divisors, whose sum is σ = 201997074. Its totient is φ = 201997072.

The previous prime is 201997069. The next prime is 201997087. The reversal of 201997073 is 370799102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201980944 + 16129 = 14212^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 201997073 - 2² = 201997069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201997973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100998536 + 100998537.

It is an arithmetic number, because the mean of its divisors is an integer number (100998537).

Almost surely, 2^201997073 is an apocalyptic number.

It is an amenable number.

201997073 is a deficient number, since it is larger than the sum of its proper divisors (1).

201997073 is an equidigital number, since it uses as much as digits as its factorization.

201997073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 201997073 is about 14212.5674316782. The cubic root of 201997073 is about 586.7435968259.

It can be divided in two parts, 20199 and 7073, that added together give a palindrome (27272).

The spelling of 201997073 in words is "two hundred one million, nine hundred ninety-seven thousand, seventy-three".