999829879 has 2 divisors, whose sum is σ = 999829880. Its totient is φ = 999829878.

The previous prime is 999829867. The next prime is 999829903. The reversal of 999829879 is 978928999.

It is a weak prime.

It is an emirp because it is prime and its reverse (978928999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999829879 - 2⁵ = 999829847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999829379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499914939 + 499914940.

It is an arithmetic number, because the mean of its divisors is an integer number (499914940).

Almost surely, 2^999829879 is an apocalyptic number.

999829879 is a deficient number, since it is larger than the sum of its proper divisors (1).

999829879 is an equidigital number, since it uses as much as digits as its factorization.

999829879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 70.

The square root of 999829879 is about 31620.0866380850. The cubic root of 999829879 is about 999.9432897840.

The spelling of 999829879 in words is "nine hundred ninety-nine million, eight hundred twenty-nine thousand, eight hundred seventy-nine".