999999000445 has 8 divisors (see below), whose sum is σ = 1207642105944. Its totient is φ = 794903663424.

The previous prime is 999999000397. The next prime is 999999000461. The reversal of 999999000445 is 544000999999.

It can be written as a sum of positive squares in 4 ways, for example, as 215164244164 + 784834756281 = 463858^2 + 885909^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 999999000445 - 2⁹ = 999998999933 is a prime.

It is a super-2 number, since 2×999999000445² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 636941254 + ... + 636942823.

It is an arithmetic number, because the mean of its divisors is an integer number (150955263243).

Almost surely, 2^999999000445 is an apocalyptic number.

It is an amenable number.

999999000445 is a deficient number, since it is larger than the sum of its proper divisors (207643105499).

999999000445 is a wasteful number, since it uses less digits than its factorization.

999999000445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273884239.

The product of its (nonzero) digits is 42515280, while the sum is 67.

The spelling of 999999000445 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, four hundred forty-five", and thus it is an aban number.