199997573 has 2 divisors, whose sum is σ = 199997574. Its totient is φ = 199997572.

The previous prime is 199997531. The next prime is 199997593. The reversal of 199997573 is 375799991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142874209 + 57123364 = 11953^2 + 7558^2 .

It is a cyclic number.

It is not a de Polignac number, because 199997573 - 2¹⁶ = 199932037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199997513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99998786 + 99998787.

It is an arithmetic number, because the mean of its divisors is an integer number (99998787).

Almost surely, 2^199997573 is an apocalyptic number.

It is an amenable number.

199997573 is a deficient number, since it is larger than the sum of its proper divisors (1).

199997573 is an equidigital number, since it uses as much as digits as its factorization.

199997573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4822335, while the sum is 59.

The square root of 199997573 is about 14142.0498160627. The cubic root of 199997573 is about 584.8011821027.

It can be divided in two parts, 19999 and 7573, that added together give a palindrome (27572).

The spelling of 199997573 in words is "one hundred ninety-nine million, nine hundred ninety-seven thousand, five hundred seventy-three".