642903833 has 16 divisors (see below), whose sum is σ = 769559616. Its totient is φ = 529314240.

The previous prime is 642903769. The next prime is 642903839. The reversal of 642903833 is 338309246.

It is not a de Polignac number, because 642903833 - 2⁶ = 642903769 is a prime.

It is a super-3 number, since 3×642903833³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642903839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34835 + ... + 49992.

It is an arithmetic number, because the mean of its divisors is an integer number (48097476).

Almost surely, 2^642903833 is an apocalyptic number.

It is an amenable number.

642903833 is a deficient number, since it is larger than the sum of its proper divisors (126655783).

642903833 is a wasteful number, since it uses less digits than its factorization.

642903833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84904.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 642903833 is about 25355.5483671720. The cubic root of 642903833 is about 863.0752677820.

The spelling of 642903833 in words is "six hundred forty-two million, nine hundred three thousand, eight hundred thirty-three".