441969869 has 4 divisors (see below), whose sum is σ = 482148960. Its totient is φ = 401790780.

The previous prime is 441969833. The next prime is 441969877. The reversal of 441969869 is 968969144.

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 441969869 - 2⁸ = 441969613 is a prime.

It is a super-2 number, since 2×441969869² = 390674730207754322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441969169) 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, 20089529 + ... + 20089550.

It is an arithmetic number, because the mean of its divisors is an integer number (120537240).

Almost surely, 2^441969869 is an apocalyptic number.

It is an amenable number.

441969869 is a deficient number, since it is larger than the sum of its proper divisors (40179091).

441969869 is a wasteful number, since it uses less digits than its factorization.

441969869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40179090.

The product of its digits is 3359232, while the sum is 56.

The square root of 441969869 is about 21023.0794366572. The cubic root of 441969869 is about 761.7238506981.

The spelling of 441969869 in words is "four hundred forty-one million, nine hundred sixty-nine thousand, eight hundred sixty-nine".