642524983 has 2 divisors, whose sum is σ = 642524984. Its totient is φ = 642524982.

The previous prime is 642524923. The next prime is 642524999. The reversal of 642524983 is 389425246.

642524983 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 642524983 - 2⁹ = 642524471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642524923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321262491 + 321262492.

It is an arithmetic number, because the mean of its divisors is an integer number (321262492).

Almost surely, 2^642524983 is an apocalyptic number.

642524983 is a deficient number, since it is larger than the sum of its proper divisors (1).

642524983 is an equidigital number, since it uses as much as digits as its factorization.

642524983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The square root of 642524983 is about 25348.0765147969. The cubic root of 642524983 is about 862.9057036387.

It can be divided in two parts, 642 and 524983, that added together give a square (525625 = 725²).

The spelling of 642524983 in words is "six hundred forty-two million, five hundred twenty-four thousand, nine hundred eighty-three".