643825483 has 4 divisors (see below), whose sum is σ = 735800560. Its totient is φ = 551850408.

The previous prime is 643825459. The next prime is 643825517. The reversal of 643825483 is 384528346.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 643825483 - 2⁹ = 643824971 is a prime.

It is a super-2 number, since 2×643825483² = 829022505120366578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643825423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45987528 + ... + 45987541.

It is an arithmetic number, because the mean of its divisors is an integer number (183950140).

Almost surely, 2^643825483 is an apocalyptic number.

643825483 is a deficient number, since it is larger than the sum of its proper divisors (91975077).

643825483 is an equidigital number, since it uses as much as digits as its factorization.

643825483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91975076.

The product of its digits is 552960, while the sum is 43.

The square root of 643825483 is about 25373.7163813266. The cubic root of 643825483 is about 863.4874981803.

The spelling of 643825483 in words is "six hundred forty-three million, eight hundred twenty-five thousand, four hundred eighty-three".