643435414 has 8 divisors (see below), whose sum is σ = 1021926888. Its totient is φ = 302793120.

The previous prime is 643435343. The next prime is 643435417. The reversal of 643435414 is 414534346.

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 18924571 = 643435414 / (6 + 4 + 3 + 4 + 3 + 5 + 4 + 1 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 643435414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643435417) 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, 9462252 + ... + 9462319.

It is an arithmetic number, because the mean of its divisors is an integer number (127740861).

Almost surely, 2^643435414 is an apocalyptic number.

643435414 is a deficient number, since it is larger than the sum of its proper divisors (378491474).

643435414 is a wasteful number, since it uses less digits than its factorization.

643435414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18924590.

The product of its digits is 69120, while the sum is 34.

The square root of 643435414 is about 25366.0287392410. The cubic root of 643435414 is about 863.3130783731.

The spelling of 643435414 in words is "six hundred forty-three million, four hundred thirty-five thousand, four hundred fourteen".