643470104 has 16 divisors (see below), whose sum is σ = 1207140000. Its totient is φ = 321566112.

The previous prime is 643470097. The next prime is 643470109. The reversal of 643470104 is 401074346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643470109) by changing a digit.

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, 4127 + ... + 36110.

It is an arithmetic number, because the mean of its divisors is an integer number (75446250).

Almost surely, 2^643470104 is an apocalyptic number.

It is an amenable number.

643470104 is a deficient number, since it is larger than the sum of its proper divisors (563669896).

643470104 is a wasteful number, since it uses less digits than its factorization.

643470104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42242 (or 42238 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 643470104 is about 25366.7125185744. The cubic root of 643470104 is about 863.3285929023.

The spelling of 643470104 in words is "six hundred forty-three million, four hundred seventy thousand, one hundred four".