4420320991 has 4 divisors (see below), whose sum is σ = 4421439232. Its totient is φ = 4419202752.

The previous prime is 4420320973. The next prime is 4420320997. The reversal of 4420320991 is 1990230244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4420320991 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 (4420320997) 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, 553170 + ... + 561103.

It is an arithmetic number, because the mean of its divisors is an integer number (1105359808).

Almost surely, 2^4420320991 is an apocalyptic number.

4420320991 is a deficient number, since it is larger than the sum of its proper divisors (1118241).

4420320991 is a wasteful number, since it uses less digits than its factorization.

4420320991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118240.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 4420320991 is about 66485.4945909256. The cubic root of 4420320991 is about 1641.1613070289.

The spelling of 4420320991 in words is "four billion, four hundred twenty million, three hundred twenty thousand, nine hundred ninety-one".