999603613 has 2 divisors, whose sum is σ = 999603614. Its totient is φ = 999603612.

The previous prime is 999603607. The next prime is 999603617. The reversal of 999603613 is 316306999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 937461924 + 62141689 = 30618^2 + 7883^2 .

It is an emirp because it is prime and its reverse (316306999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999603613 - 2¹⁷ = 999472541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999603617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499801806 + 499801807.

It is an arithmetic number, because the mean of its divisors is an integer number (499801807).

Almost surely, 2^999603613 is an apocalyptic number.

It is an amenable number.

999603613 is a deficient number, since it is larger than the sum of its proper divisors (1).

999603613 is an equidigital number, since it uses as much as digits as its factorization.

999603613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 999603613 is about 31616.5085517044. The cubic root of 999603613 is about 999.8678535381.

The spelling of 999603613 in words is "nine hundred ninety-nine million, six hundred three thousand, six hundred thirteen".