642910203 has 32 divisors (see below), whose sum is σ = 1038434880. Its totient is φ = 395619552.

The previous prime is 642910189. The next prime is 642910253. The reversal of 642910203 is 302019246.

642910203 is a `hidden beast` number, since 642 + 9 + 10 + 2 + 0 + 3 = 666.

It is not a de Polignac number, because 642910203 - 2¹³ = 642902011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (642910253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17125 + ... + 39737.

It is an arithmetic number, because the mean of its divisors is an integer number (32451090).

Almost surely, 2^642910203 is an apocalyptic number.

642910203 is a deficient number, since it is larger than the sum of its proper divisors (395524677).

642910203 is an equidigital number, since it uses as much as digits as its factorization.

642910203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22647 (or 22629 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 642910203 is about 25355.6739803934. The cubic root of 642910203 is about 863.0781182712.

Adding to 642910203 its reverse (302019246), we get a palindrome (944929449).

The spelling of 642910203 in words is "six hundred forty-two million, nine hundred ten thousand, two hundred three".