443939698945 has 8 divisors (see below), whose sum is σ = 538713343080. Its totient is φ = 351161289600.

The previous prime is 443939698907. The next prime is 443939698967. The reversal of 443939698945 is 549896939344.

It is a Cunningham number, because it is equal to 666288²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 443939698944 = 1^2 + 666288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 443939698945 - 2⁷ = 443939698817 is a prime.

It is a super-2 number, since 2×443939698945² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498808206 + ... + 498809095.

It is an arithmetic number, because the mean of its divisors is an integer number (67339167885).

Almost surely, 2^443939698945 is an apocalyptic number.

It is an amenable number.

443939698945 is a deficient number, since it is larger than the sum of its proper divisors (94773644135).

443939698945 is an equidigital number, since it uses as much as digits as its factorization.

443939698945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997617395.

The product of its digits is 906992640, while the sum is 73.

The spelling of 443939698945 in words is "four hundred forty-three billion, nine hundred thirty-nine million, six hundred ninety-eight thousand, nine hundred forty-five".