4400971643 has 4 divisors (see below), whose sum is σ = 4401243048. Its totient is φ = 4400700240.

The previous prime is 4400971609. The next prime is 4400971661. The reversal of 4400971643 is 3461790044.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4400971643 - 2³² = 106004347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4400971597 and 4400971606.

It is not an unprimeable number, because it can be changed into a prime (4400971343) by changing a digit.

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, 109721 + ... + 144362.

It is an arithmetic number, because the mean of its divisors is an integer number (1100310762).

Almost surely, 2^4400971643 is an apocalyptic number.

4400971643 is a deficient number, since it is larger than the sum of its proper divisors (271405).

4400971643 is a wasteful number, since it uses less digits than its factorization.

4400971643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271404.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 4400971643 is about 66339.8194374992. The cubic root of 4400971643 is about 1638.7631516839.

The spelling of 4400971643 in words is "four billion, four hundred million, nine hundred seventy-one thousand, six hundred forty-three".