643397614 has 8 divisors (see below), whose sum is σ = 965602008. Its totient is φ = 321530280.

The previous prime is 643397603. The next prime is 643397639. The reversal of 643397614 is 416793346.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79437 + ... + 87160.

It is an arithmetic number, because the mean of its divisors is an integer number (120700251).

Almost surely, 2^643397614 is an apocalyptic number.

643397614 is a deficient number, since it is larger than the sum of its proper divisors (322204394).

643397614 is a wasteful number, since it uses less digits than its factorization.

643397614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168530.

The product of its digits is 326592, while the sum is 43.

The square root of 643397614 is about 25365.2836372866. The cubic root of 643397614 is about 863.2961723129.

The spelling of 643397614 in words is "six hundred forty-three million, three hundred ninety-seven thousand, six hundred fourteen".