643002076 has 12 divisors (see below), whose sum is σ = 1174177872. Its totient is φ = 307522688.

The previous prime is 643002071. The next prime is 643002083. The reversal of 643002076 is 670200346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643002071) 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, 3494485 + ... + 3494668.

It is an arithmetic number, because the mean of its divisors is an integer number (97848156).

Almost surely, 2^643002076 is an apocalyptic number.

It is an amenable number.

643002076 is a deficient number, since it is larger than the sum of its proper divisors (531175796).

643002076 is a wasteful number, since it uses less digits than its factorization.

643002076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6989180 (or 6989178 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 643002076 is about 25357.4856009029. The cubic root of 643002076 is about 863.1192281073.

The spelling of 643002076 in words is "six hundred forty-three million, two thousand, seventy-six".