944472721 has 4 divisors (see below), whose sum is σ = 945876772. Its totient is φ = 943068672.

The previous prime is 944472709. The next prime is 944472731. The reversal of 944472721 is 127274449.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127274449 = 47 ⋅2707967.

It can be written as a sum of positive squares in 2 ways, for example, as 716311696 + 228161025 = 26764^2 + 15105^2 .

It is a cyclic number.

It is not a de Polignac number, because 944472721 - 2¹⁷ = 944341649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (944472701) 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, 701016 + ... + 702361.

It is an arithmetic number, because the mean of its divisors is an integer number (236469193).

Almost surely, 2^944472721 is an apocalyptic number.

It is an amenable number.

944472721 is a deficient number, since it is larger than the sum of its proper divisors (1404051).

944472721 is a wasteful number, since it uses less digits than its factorization.

944472721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404050.

The product of its digits is 112896, while the sum is 40.

The square root of 944472721 is about 30732.2749076602. The cubic root of 944472721 is about 981.1373443307.

The spelling of 944472721 in words is "nine hundred forty-four million, four hundred seventy-two thousand, seven hundred twenty-one".