999478842013 has 2 divisors, whose sum is σ = 999478842014. Its totient is φ = 999478842012.

The previous prime is 999478841983. The next prime is 999478842059. The reversal of 999478842013 is 310248874999.

999478842013 = 706922² + 706923².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499740127929 + 499738714084 = 706923^2 + 706922^2 .

It is a cyclic number.

It is not a de Polignac number, because 999478842013 - 2⁵ = 999478841981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999478842073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499739421006 + 499739421007.

It is an arithmetic number, because the mean of its divisors is an integer number (499739421007).

Almost surely, 2^999478842013 is an apocalyptic number.

999478842013 is the 706923-rd centered square number.

It is an amenable number.

999478842013 is a deficient number, since it is larger than the sum of its proper divisors (1).

999478842013 is an equidigital number, since it uses as much as digits as its factorization.

999478842013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 999478842013 in words is "nine hundred ninety-nine billion, four hundred seventy-eight million, eight hundred forty-two thousand, thirteen".