643426314 has 16 divisors (see below), whose sum is σ = 1288449120. Its totient is φ = 214209360.

The previous prime is 643426313. The next prime is 643426321. The reversal of 643426314 is 413624346.

It is not an unprimeable number, because it can be changed into a prime (643426313) 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 7 ways as a sum of consecutive naturals, for example, 61249 + ... + 70980.

It is an arithmetic number, because the mean of its divisors is an integer number (80528070).

Almost surely, 2^643426314 is an apocalyptic number.

643426314 is an abundant number, since it is smaller than the sum of its proper divisors (645022806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643426314 is a wasteful number, since it uses less digits than its factorization.

643426314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133045.

The product of its digits is 41472, while the sum is 33.

The square root of 643426314 is about 25365.8493648449. The cubic root of 643426314 is about 863.3090084562.

The spelling of 643426314 in words is "six hundred forty-three million, four hundred twenty-six thousand, three hundred fourteen".