643298043 has 8 divisors (see below), whose sum is σ = 857998656. Its totient is φ = 428731400.

The previous prime is 643298041. The next prime is 643298059. The reversal of 643298043 is 340892346.

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 643298043 - 2¹ = 643298041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643297992 and 643298010.

It is not an unprimeable number, because it can be changed into a prime (643298041) 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, 21693 + ... + 41918.

It is an arithmetic number, because the mean of its divisors is an integer number (107249832).

Almost surely, 2^643298043 is an apocalyptic number.

643298043 is a deficient number, since it is larger than the sum of its proper divisors (214700613).

643298043 is a wasteful number, since it uses less digits than its factorization.

643298043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66985.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 643298043 is about 25363.3208196403. The cubic root of 643298043 is about 863.2516359868.

The spelling of 643298043 in words is "six hundred forty-three million, two hundred ninety-eight thousand, forty-three".