643238341 has 8 divisors (see below), whose sum is σ = 647281440. Its totient is φ = 639208272.

The previous prime is 643238339. The next prime is 643238389. The reversal of 643238341 is 143832346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643238341 - 2¹ = 643238339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643238297 and 643238306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643238041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107166 + ... + 113008.

It is an arithmetic number, because the mean of its divisors is an integer number (80910180).

Almost surely, 2^643238341 is an apocalyptic number.

It is an amenable number.

643238341 is a deficient number, since it is larger than the sum of its proper divisors (4043099).

643238341 is a wasteful number, since it uses less digits than its factorization.

643238341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6515.

The product of its digits is 41472, while the sum is 34.

The square root of 643238341 is about 25362.1438565434. The cubic root of 643238341 is about 863.2249301470.

The spelling of 643238341 in words is "six hundred forty-three million, two hundred thirty-eight thousand, three hundred forty-one".