999309013 has 2 divisors, whose sum is σ = 999309014. Its totient is φ = 999309012.

The previous prime is 999309001. The next prime is 999309029. The reversal of 999309013 is 310903999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549105489 + 450203524 = 23433^2 + 21218^2 .

It is a cyclic number.

It is not a de Polignac number, because 999309013 - 2²¹ = 997211861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999309043) 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 as a sum of consecutive naturals, namely, 499654506 + 499654507.

It is an arithmetic number, because the mean of its divisors is an integer number (499654507).

Almost surely, 2^999309013 is an apocalyptic number.

It is an amenable number.

999309013 is a deficient number, since it is larger than the sum of its proper divisors (1).

999309013 is an equidigital number, since it uses as much as digits as its factorization.

999309013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 43.

The square root of 999309013 is about 31611.8492499253. The cubic root of 999309013 is about 999.7696179282.

The spelling of 999309013 in words is "nine hundred ninety-nine million, three hundred nine thousand, thirteen".