999309113 has 36 divisors (see below), whose sum is σ = 1196209980. Its totient is φ = 834169600.

The previous prime is 999309107. The next prime is 999309139. The reversal of 999309113 is 311903999.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 241243024 + 758066089 = 15532^2 + 27533^2 .

It is not a de Polignac number, because 999309113 - 2¹² = 999305017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999309013) 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 35 ways as a sum of consecutive naturals, for example, 24373373 + ... + 24373413.

It is an arithmetic number, because the mean of its divisors is an integer number (33228055).

Almost surely, 2^999309113 is an apocalyptic number.

It is an amenable number.

999309113 is a deficient number, since it is larger than the sum of its proper divisors (196900867).

999309113 is an equidigital number, since it uses as much as digits as its factorization.

999309113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 59049, while the sum is 44.

The square root of 999309113 is about 31611.8508316106. The cubic root of 999309113 is about 999.7696512769.

The spelling of 999309113 in words is "nine hundred ninety-nine million, three hundred nine thousand, one hundred thirteen".