643474111 has 8 divisors (see below), whose sum is σ = 735768704. Its totient is φ = 551271960.

The previous prime is 643474109. The next prime is 643474171. The reversal of 643474111 is 111474346.

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 643474111 - 2¹ = 643474109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643474171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7485 + ... + 36646.

It is an arithmetic number, because the mean of its divisors is an integer number (91971088).

Almost surely, 2^643474111 is an apocalyptic number.

643474111 is a deficient number, since it is larger than the sum of its proper divisors (92294593).

643474111 is a wasteful number, since it uses less digits than its factorization.

643474111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46221.

The product of its digits is 8064, while the sum is 31.

The square root of 643474111 is about 25366.7914999118. The cubic root of 643474111 is about 863.3303849309.

The spelling of 643474111 in words is "six hundred forty-three million, four hundred seventy-four thousand, one hundred eleven".