445889729 has 4 divisors (see below), whose sum is σ = 447167700. Its totient is φ = 444611760.

The previous prime is 445889693. The next prime is 445889737. The reversal of 445889729 is 927988544.

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 172318129 + 273571600 = 13127^2 + 16540^2 .

It is a cyclic number.

It is not a de Polignac number, because 445889729 - 2¹² = 445885633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445889789) 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, 638462 + ... + 639159.

It is an arithmetic number, because the mean of its divisors is an integer number (111791925).

Almost surely, 2^445889729 is an apocalyptic number.

It is an amenable number.

445889729 is a deficient number, since it is larger than the sum of its proper divisors (1277971).

445889729 is a wasteful number, since it uses less digits than its factorization.

445889729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277970.

The product of its digits is 5806080, while the sum is 56.

The square root of 445889729 is about 21116.1011789582. The cubic root of 445889729 is about 763.9691522179.

The spelling of 445889729 in words is "four hundred forty-five million, eight hundred eighty-nine thousand, seven hundred twenty-nine".