642734283 has 32 divisors (see below), whose sum is σ = 932981760. Its totient is φ = 392071680.

The previous prime is 642734269. The next prime is 642734303. The reversal of 642734283 is 382437246.

It is not a de Polignac number, because 642734283 - 2⁵ = 642734251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642734483) 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, 268753 + ... + 271133.

It is an arithmetic number, because the mean of its divisors is an integer number (29155680).

Almost surely, 2^642734283 is an apocalyptic number.

642734283 is a deficient number, since it is larger than the sum of its proper divisors (290247477).

642734283 is a wasteful number, since it uses less digits than its factorization.

642734283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547.

The product of its digits is 193536, while the sum is 39.

The square root of 642734283 is about 25352.2046970278. The cubic root of 642734283 is about 862.9993895195. Note that the first 3 decimals are identical.

The spelling of 642734283 in words is "six hundred forty-two million, seven hundred thirty-four thousand, two hundred eighty-three".