643258093 has 4 divisors (see below), whose sum is σ = 643353148. Its totient is φ = 643163040.

The previous prime is 643258001. The next prime is 643258117. The reversal of 643258093 is 390852346.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69272329 + 573985764 = 8323^2 + 23958^2 .

It is a cyclic number.

It is not a de Polignac number, because 643258093 - 2⁹ = 643257581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643238093) 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, 36528 + ... + 51193.

It is an arithmetic number, because the mean of its divisors is an integer number (160838287).

Almost surely, 2^643258093 is an apocalyptic number.

It is an amenable number.

643258093 is a deficient number, since it is larger than the sum of its proper divisors (95055).

643258093 is an equidigital number, since it uses as much as digits as its factorization.

643258093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95054.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 643258093 is about 25362.5332528121. The cubic root of 643258093 is about 863.2337657751.

The spelling of 643258093 in words is "six hundred forty-three million, two hundred fifty-eight thousand, ninety-three".