999675805 has 8 divisors (see below), whose sum is σ = 1232033112. Its totient is φ = 778125888.

The previous prime is 999675779. The next prime is 999675827. The reversal of 999675805 is 508576999.

It can be written as a sum of positive squares in 4 ways, for example, as 455993316 + 543682489 = 21354^2 + 23317^2 .

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 999675805 - 2¹⁵ = 999643037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 999675805.

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, 2701642 + ... + 2702011.

It is an arithmetic number, because the mean of its divisors is an integer number (154004139).

Almost surely, 2^999675805 is an apocalyptic number.

It is an amenable number.

999675805 is a deficient number, since it is larger than the sum of its proper divisors (232357307).

999675805 is a wasteful number, since it uses less digits than its factorization.

999675805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403695.

The product of its (nonzero) digits is 6123600, while the sum is 58.

The square root of 999675805 is about 31617.6502131325. The cubic root of 999675805 is about 999.8919233199.

The spelling of 999675805 in words is "nine hundred ninety-nine million, six hundred seventy-five thousand, eight hundred five".