441643945 has 4 divisors (see below), whose sum is σ = 529972740. Its totient is φ = 353315152.

The previous prime is 441643879. The next prime is 441643981. The reversal of 441643945 is 549346144.

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

It can be written as a sum of positive squares in 2 ways, for example, as 236667456 + 204976489 = 15384^2 + 14317^2 .

It is a cyclic number.

It is not a de Polignac number, because 441643945 - 2¹⁷ = 441512873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 441643898 and 441643907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44164390 + ... + 44164399.

It is an arithmetic number, because the mean of its divisors is an integer number (132493185).

Almost surely, 2^441643945 is an apocalyptic number.

It is an amenable number.

441643945 is a deficient number, since it is larger than the sum of its proper divisors (88328795).

441643945 is an equidigital number, since it uses as much as digits as its factorization.

441643945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88328794.

The product of its digits is 207360, while the sum is 40.

The square root of 441643945 is about 21015.3264309646. The cubic root of 441643945 is about 761.5365640730.

The spelling of 441643945 in words is "four hundred forty-one million, six hundred forty-three thousand, nine hundred forty-five".