999478911 has 8 divisors (see below), whose sum is σ = 1337824944. Its totient is φ = 663726080.

The previous prime is 999478903. The next prime is 999478919. The reversal of 999478911 is 119874999.

It is an interprime number because it is at equal distance from previous prime (999478903) and next prime (999478919).

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 999478911 - 2³ = 999478903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999478919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647400 + ... + 648941.

It is an arithmetic number, because the mean of its divisors is an integer number (167228118).

Almost surely, 2^999478911 is an apocalyptic number.

999478911 is a deficient number, since it is larger than the sum of its proper divisors (338346033).

999478911 is a wasteful number, since it uses less digits than its factorization.

999478911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296601.

The product of its digits is 1469664, while the sum is 57.

The square root of 999478911 is about 31614.5363875544. The cubic root of 999478911 is about 999.8262734875.

The spelling of 999478911 in words is "nine hundred ninety-nine million, four hundred seventy-eight thousand, nine hundred eleven".