559994021 has 2 divisors, whose sum is σ = 559994022. Its totient is φ = 559994020.

The previous prime is 559994009. The next prime is 559994027. The reversal of 559994021 is 120499955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533841025 + 26152996 = 23105^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 559994021 - 2²⁶ = 492885157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (559994027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 279997010 + 279997011.

It is an arithmetic number, because the mean of its divisors is an integer number (279997011).

Almost surely, 2^559994021 is an apocalyptic number.

It is an amenable number.

559994021 is a deficient number, since it is larger than the sum of its proper divisors (1).

559994021 is an equidigital number, since it uses as much as digits as its factorization.

559994021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 44.

The square root of 559994021 is about 23664.1928026290. The cubic root of 559994021 is about 824.2541264793.

The spelling of 559994021 in words is "five hundred fifty-nine million, nine hundred ninety-four thousand, twenty-one".