643122147 has 8 divisors (see below), whose sum is σ = 877438144. Its totient is φ = 418777128.

The previous prime is 643122107. The next prime is 643122167. The reversal of 643122147 is 741221346.

643122147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 643122147 - 2⁸ = 643121891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643122107) 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, 2492593 + ... + 2492850.

It is an arithmetic number, because the mean of its divisors is an integer number (109679768).

Almost surely, 2^643122147 is an apocalyptic number.

643122147 is a deficient number, since it is larger than the sum of its proper divisors (234315997).

643122147 is a wasteful number, since it uses less digits than its factorization.

643122147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4985489.

The product of its digits is 8064, while the sum is 30.

The square root of 643122147 is about 25359.8530555680. The cubic root of 643122147 is about 863.1729496232.

The spelling of 643122147 in words is "six hundred forty-three million, one hundred twenty-two thousand, one hundred forty-seven".