642330863 has 4 divisors (see below), whose sum is σ = 642466008. Its totient is φ = 642195720.

The previous prime is 642330781. The next prime is 642330877. The reversal of 642330863 is 368033246.

642330863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 642330863 - 2¹⁰ = 642329839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642330883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60173 + ... + 70038.

It is an arithmetic number, because the mean of its divisors is an integer number (160616502).

Almost surely, 2^642330863 is an apocalyptic number.

642330863 is a deficient number, since it is larger than the sum of its proper divisors (135145).

642330863 is a wasteful number, since it uses less digits than its factorization.

642330863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135144.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 642330863 is about 25344.2471381574. The cubic root of 642330863 is about 862.8187943711.

The spelling of 642330863 in words is "six hundred forty-two million, three hundred thirty thousand, eight hundred sixty-three".