441921997 has 4 divisors (see below), whose sum is σ = 482096736. Its totient is φ = 401747260.

The previous prime is 441921989. The next prime is 441922001. The reversal of 441921997 is 799129144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 441921997 - 2³ = 441921989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441921937) 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, 20087353 + ... + 20087374.

It is an arithmetic number, because the mean of its divisors is an integer number (120524184).

Almost surely, 2^441921997 is an apocalyptic number.

It is an amenable number.

441921997 is a deficient number, since it is larger than the sum of its proper divisors (40174739).

441921997 is a wasteful number, since it uses less digits than its factorization.

441921997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40174738.

The product of its digits is 163296, while the sum is 46.

The square root of 441921997 is about 21021.9408476002. The cubic root of 441921997 is about 761.6963476461.

The spelling of 441921997 in words is "four hundred forty-one million, nine hundred twenty-one thousand, nine hundred ninety-seven".