944221603 has 4 divisors (see below), whose sum is σ = 1016854048. Its totient is φ = 871589160.

The previous prime is 944221561. The next prime is 944221609. The reversal of 944221603 is 306122449.

It is a happy number.

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

It is not a de Polignac number, because 944221603 - 2²⁵ = 910667171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (944221609) 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, 36316203 + ... + 36316228.

It is an arithmetic number, because the mean of its divisors is an integer number (254213512).

Almost surely, 2^944221603 is an apocalyptic number.

944221603 is a deficient number, since it is larger than the sum of its proper divisors (72632445).

944221603 is a wasteful number, since it uses less digits than its factorization.

944221603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72632444.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 944221603 is about 30728.1890615116. The cubic root of 944221603 is about 981.0503811389.

The spelling of 944221603 in words is "nine hundred forty-four million, two hundred twenty-one thousand, six hundred three".