999348281 has 16 divisors (see below), whose sum is σ = 1094758416. Its totient is φ = 908384256.

The previous prime is 999348277. The next prime is 999348283. The reversal of 999348281 is 182843999.

999348281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 351187600 + 648160681 = 18740^2 + 25459^2 .

It is not a de Polignac number, because 999348281 - 2² = 999348277 is a prime.

It is a super-2 number, since 2×999348281² = 1997393973475309922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999348283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80375 + ... + 91971.

It is an arithmetic number, because the mean of its divisors is an integer number (68422401).

Almost surely, 2^999348281 is an apocalyptic number.

It is an amenable number.

999348281 is a deficient number, since it is larger than the sum of its proper divisors (95410135).

999348281 is a wasteful number, since it uses less digits than its factorization.

999348281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11788.

The product of its digits is 1119744, while the sum is 53.

The square root of 999348281 is about 31612.4703400414. The cubic root of 999348281 is about 999.7827131232.

The spelling of 999348281 in words is "nine hundred ninety-nine million, three hundred forty-eight thousand, two hundred eighty-one".