999456111 has 16 divisors (see below), whose sum is σ = 1484660320. Its totient is φ = 664511040.

The previous prime is 999456103. The next prime is 999456167. The reversal of 999456111 is 111654999.

It is not a de Polignac number, because 999456111 - 2³ = 999456103 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 (999455111) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39550 + ... + 59691.

It is an arithmetic number, because the mean of its divisors is an integer number (92791270).

Almost surely, 2^999456111 is an apocalyptic number.

999456111 is a deficient number, since it is larger than the sum of its proper divisors (485204209).

999456111 is a wasteful number, since it uses less digits than its factorization.

999456111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99623 (or 99617 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 999456111 is about 31614.1757918817. The cubic root of 999456111 is about 999.8186707884.

The spelling of 999456111 in words is "nine hundred ninety-nine million, four hundred fifty-six thousand, one hundred eleven".