9999000775 has 6 divisors (see below), whose sum is σ = 12398760992. Its totient is φ = 7999200600.

The previous prime is 9999000761. The next prime is 9999000797. The reversal of 9999000775 is 5770009999.

It is not a de Polignac number, because 9999000775 - 2¹³ = 9998992583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199979991 + ... + 199980040.

Almost surely, 2^9999000775 is an apocalyptic number.

9999000775 is a deficient number, since it is larger than the sum of its proper divisors (2399760217).

9999000775 is a wasteful number, since it uses less digits than its factorization.

9999000775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399960041 (or 399960036 counting only the distinct ones).

The product of its (nonzero) digits is 1607445, while the sum is 55.

The square root of 9999000775 is about 99995.0037501874. The cubic root of 9999000775 is about 2154.3629288082.

The spelling of 9999000775 in words is "nine billion, nine hundred ninety-nine million, seven hundred seventy-five", and thus it is an aban number.