521983193 has 2 divisors, whose sum is σ = 521983194. Its totient is φ = 521983192.

The previous prime is 521983159. The next prime is 521983223. The reversal of 521983193 is 391389125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480354889 + 41628304 = 21917^2 + 6452^2 .

It is a cyclic number.

It is not a de Polignac number, because 521983193 - 2¹⁰ = 521982169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521983193.

It is not a weakly prime, because it can be changed into another prime (521983123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260991596 + 260991597.

It is an arithmetic number, because the mean of its divisors is an integer number (260991597).

Almost surely, 2^521983193 is an apocalyptic number.

It is an amenable number.

521983193 is a deficient number, since it is larger than the sum of its proper divisors (1).

521983193 is an equidigital number, since it uses as much as digits as its factorization.

521983193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 521983193 is about 22846.9515034282. The cubic root of 521983193 is about 805.1661465376.

The spelling of 521983193 in words is "five hundred twenty-one million, nine hundred eighty-three thousand, one hundred ninety-three".