999999001013 has 2 divisors, whose sum is σ = 999999001014. Its totient is φ = 999999001012.

The previous prime is 999999000961. The next prime is 999999001039. The reversal of 999999001013 is 310100999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 956810679889 + 43188321124 = 978167^2 + 207818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999999001013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999001913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999500506 + 499999500507.

It is an arithmetic number, because the mean of its divisors is an integer number (499999500507).

Almost surely, 2^999999001013 is an apocalyptic number.

It is an amenable number.

999999001013 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999001013 is an equidigital number, since it uses as much as digits as its factorization.

999999001013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1594323, while the sum is 59.

The spelling of 999999001013 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, one thousand, thirteen".