999549535513 has 2 divisors, whose sum is σ = 999549535514. Its totient is φ = 999549535512.

The previous prime is 999549535451. The next prime is 999549535519. The reversal of 999549535513 is 315535945999.

999549535513 = 706947² + 706948².

999549535513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499775474704 + 499774060809 = 706948^2 + 706947^2 .

It is a cyclic number.

It is not a de Polignac number, because 999549535513 - 2²⁵ = 999515981081 is a prime.

It is not a weakly prime, because it can be changed into another prime (999549535519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499774767756 + 499774767757.

It is an arithmetic number, because the mean of its divisors is an integer number (499774767757).

Almost surely, 2^999549535513 is an apocalyptic number.

999549535513 is the 706948-th centered square number.

It is an amenable number.

999549535513 is a deficient number, since it is larger than the sum of its proper divisors (1).

999549535513 is an equidigital number, since it uses as much as digits as its factorization.

999549535513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147622500, while the sum is 67.

The spelling of 999549535513 in words is "nine hundred ninety-nine billion, five hundred forty-nine million, five hundred thirty-five thousand, five hundred thirteen".