642033563 has 2 divisors, whose sum is σ = 642033564. Its totient is φ = 642033562.

The previous prime is 642033533. The next prime is 642033589. The reversal of 642033563 is 365330246.

642033563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642033563 - 2⁶ = 642033499 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (642033533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321016781 + 321016782.

It is an arithmetic number, because the mean of its divisors is an integer number (321016782).

Almost surely, 2^642033563 is an apocalyptic number.

642033563 is a deficient number, since it is larger than the sum of its proper divisors (1).

642033563 is an equidigital number, since it uses as much as digits as its factorization.

642033563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 32.

The square root of 642033563 is about 25338.3812229590. The cubic root of 642033563 is about 862.6856565402.

The spelling of 642033563 in words is "six hundred forty-two million, thirty-three thousand, five hundred sixty-three".