444429661 has 4 divisors (see below), whose sum is σ = 478616572. Its totient is φ = 410242752.

The previous prime is 444429659. The next prime is 444429677. The reversal of 444429661 is 166924444.

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 35176761 + 409252900 = 5931^2 + 20230^2 .

It is a cyclic number.

It is not a de Polignac number, because 444429661 - 2¹ = 444429659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444429631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17093436 + ... + 17093461.

It is an arithmetic number, because the mean of its divisors is an integer number (119654143).

Almost surely, 2^444429661 is an apocalyptic number.

It is an amenable number.

444429661 is a deficient number, since it is larger than the sum of its proper divisors (34186911).

444429661 is a wasteful number, since it uses less digits than its factorization.

444429661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34186910.

The product of its digits is 165888, while the sum is 40.

The square root of 444429661 is about 21081.5004447027. The cubic root of 444429661 is about 763.1343668654.

The spelling of 444429661 in words is "four hundred forty-four million, four hundred twenty-nine thousand, six hundred sixty-one".