643108492 has 12 divisors (see below), whose sum is σ = 1212012256. Its totient is φ = 296819280.

The previous prime is 643108489. The next prime is 643108517. The reversal of 643108492 is 294801346.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6183684 + ... + 6183787.

Almost surely, 2^643108492 is an apocalyptic number.

It is an amenable number.

643108492 is a deficient number, since it is larger than the sum of its proper divisors (568903764).

643108492 is a wasteful number, since it uses less digits than its factorization.

643108492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12367488 (or 12367486 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 643108492 is about 25359.5838293928. The cubic root of 643108492 is about 863.1668405141.

The spelling of 643108492 in words is "six hundred forty-three million, one hundred eight thousand, four hundred ninety-two".