999539873 has 2 divisors, whose sum is σ = 999539874. Its totient is φ = 999539872.

The previous prime is 999539833. The next prime is 999539903. The reversal of 999539873 is 378935999.

999539873 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., 593799424 + 405740449 = 24368^2 + 20143^2 .

It is a cyclic number.

It is not a de Polignac number, because 999539873 - 2⁸ = 999539617 is a prime.

It is a super-2 number, since 2×999539873² = 1998159915433712258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999539813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499769936 + 499769937.

It is an arithmetic number, because the mean of its divisors is an integer number (499769937).

Almost surely, 2^999539873 is an apocalyptic number.

It is an amenable number.

999539873 is a deficient number, since it is larger than the sum of its proper divisors (1).

999539873 is an equidigital number, since it uses as much as digits as its factorization.

999539873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16533720, while the sum is 62.

The square root of 999539873 is about 31615.5005179421. The cubic root of 999539873 is about 999.8466008032.

The spelling of 999539873 in words is "nine hundred ninety-nine million, five hundred thirty-nine thousand, eight hundred seventy-three".