642433203 has 6 divisors (see below), whose sum is σ = 927959084. Its totient is φ = 428288796.

The previous prime is 642433163. The next prime is 642433237. The reversal of 642433203 is 302334246.

It is a happy number.

642433203 is a `hidden beast` number, since 6 + 424 + 33 + 203 = 666.

It is not a de Polignac number, because 642433203 - 2⁶ = 642433139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642433283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35690725 + ... + 35690742.

Almost surely, 2^642433203 is an apocalyptic number.

642433203 is a deficient number, since it is larger than the sum of its proper divisors (285525881).

642433203 is a wasteful number, since it uses less digits than its factorization.

642433203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71381473 (or 71381470 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 642433203 is about 25346.2660563642. The cubic root of 642433203 is about 862.8646150903.

Adding to 642433203 its reverse (302334246), we get a palindrome (944767449).

The spelling of 642433203 in words is "six hundred forty-two million, four hundred thirty-three thousand, two hundred three".