522943909 has 2 divisors, whose sum is σ = 522943910. Its totient is φ = 522943908.

The previous prime is 522943901. The next prime is 522943931. The reversal of 522943909 is 909349225.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511754884 + 11189025 = 22622^2 + 3345^2 .

It is a cyclic number.

It is not a de Polignac number, because 522943909 - 2³ = 522943901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522943901) 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, 261471954 + 261471955.

It is an arithmetic number, because the mean of its divisors is an integer number (261471955).

Almost surely, 2^522943909 is an apocalyptic number.

It is an amenable number.

522943909 is a deficient number, since it is larger than the sum of its proper divisors (1).

522943909 is an equidigital number, since it uses as much as digits as its factorization.

522943909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 522943909 is about 22867.9668750853. The cubic root of 522943909 is about 805.6598162748.

The spelling of 522943909 in words is "five hundred twenty-two million, nine hundred forty-three thousand, nine hundred nine".