999000775 has 6 divisors (see below), whose sum is σ = 1238760992. Its totient is φ = 799200600.

The previous prime is 999000773. The next prime is 999000809. The reversal of 999000775 is 577000999.

It is not a de Polignac number, because 999000775 - 2¹ = 999000773 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 (999000773) 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 5 ways as a sum of consecutive naturals, for example, 19979991 + ... + 19980040.

Almost surely, 2^999000775 is an apocalyptic number.

999000775 is a deficient number, since it is larger than the sum of its proper divisors (239760217).

999000775 is a wasteful number, since it uses less digits than its factorization.

999000775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39960041 (or 39960036 counting only the distinct ones).

The product of its (nonzero) digits is 178605, while the sum is 46.

The square root of 999000775 is about 31606.9735185133. The cubic root of 999000775 is about 999.6668139994. Note that the first 3 decimals are identical.

The spelling of 999000775 in words is "nine hundred ninety-nine million, seven hundred seventy-five", and thus it is an aban number.