445499999 has 4 divisors (see below), whose sum is σ = 509142864. Its totient is φ = 381857136.

The previous prime is 445499987. The next prime is 445500007. The reversal of 445499999 is 999994544.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 445499999 - 2⁴ = 445499983 is a prime.

It is a Duffinian number.

445499999 is a modest number, since divided by 99999 gives 4454 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445409999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31821422 + ... + 31821435.

It is an arithmetic number, because the mean of its divisors is an integer number (127285716).

Almost surely, 2^445499999 is an apocalyptic number.

445499999 is a deficient number, since it is larger than the sum of its proper divisors (63642865).

445499999 is an equidigital number, since it uses as much as digits as its factorization.

445499999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63642864.

The product of its digits is 18895680, while the sum is 62.

The square root of 445499999 is about 21106.8708955165. The cubic root of 445499999 is about 763.7465048775.

The spelling of 445499999 in words is "four hundred forty-five million, four hundred ninety-nine thousand, nine hundred ninety-nine".