642884603 has 4 divisors (see below), whose sum is σ = 663622848. Its totient is φ = 622146360.

The previous prime is 642884587. The next prime is 642884617. The reversal of 642884603 is 306488246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642884603 - 2⁴ = 642884587 is a prime.

It is a super-2 number, since 2×642884603² = 826601225548935218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642884663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10369076 + ... + 10369137.

It is an arithmetic number, because the mean of its divisors is an integer number (165905712).

Almost surely, 2^642884603 is an apocalyptic number.

642884603 is a deficient number, since it is larger than the sum of its proper divisors (20738245).

642884603 is a wasteful number, since it uses less digits than its factorization.

642884603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20738244.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 642884603 is about 25355.1691573927. The cubic root of 642884603 is about 863.0666625018.

The spelling of 642884603 in words is "six hundred forty-two million, eight hundred eighty-four thousand, six hundred three".