643614041 has 4 divisors (see below), whose sum is σ = 735558912. Its totient is φ = 551669172.

The previous prime is 643614031. The next prime is 643614053. The reversal of 643614041 is 140416346.

643614041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 643614041 - 2¹⁴ = 643597657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643613995 and 643614013.

It is not an unprimeable number, because it can be changed into a prime (643614031) 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, 45972425 + ... + 45972438.

It is an arithmetic number, because the mean of its divisors is an integer number (183889728).

Almost surely, 2^643614041 is an apocalyptic number.

It is an amenable number.

643614041 is a deficient number, since it is larger than the sum of its proper divisors (91944871).

643614041 is an equidigital number, since it uses as much as digits as its factorization.

643614041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91944870.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 643614041 is about 25369.5494835837. The cubic root of 643614041 is about 863.3929603906.

The spelling of 643614041 in words is "six hundred forty-three million, six hundred fourteen thousand, forty-one".