999905113 has 2 divisors, whose sum is σ = 999905114. Its totient is φ = 999905112.

The previous prime is 999905111. The next prime is 999905117. The reversal of 999905113 is 311509999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994014784 + 5890329 = 31528^2 + 2427^2 .

It is a cyclic number.

It is not a de Polignac number, because 999905113 - 2¹ = 999905111 is a prime.

Together with 999905111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999905111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499952556 + 499952557.

It is an arithmetic number, because the mean of its divisors is an integer number (499952557).

Almost surely, 2^999905113 is an apocalyptic number.

It is an amenable number.

999905113 is a deficient number, since it is larger than the sum of its proper divisors (1).

999905113 is an equidigital number, since it uses as much as digits as its factorization.

999905113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98415, while the sum is 46.

The square root of 999905113 is about 31621.2762708908. The cubic root of 999905113 is about 999.9683699996.

The spelling of 999905113 in words is "nine hundred ninety-nine million, nine hundred five thousand, one hundred thirteen".