999829969 has 2 divisors, whose sum is σ = 999829970. Its totient is φ = 999829968.

The previous prime is 999829967. The next prime is 999829997. The reversal of 999829969 is 969928999.

999829969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 996980625 + 2849344 = 31575^2 + 1688^2 .

It is a cyclic number.

It is not a de Polignac number, because 999829969 - 2¹ = 999829967 is a prime.

It is a super-2 number, since 2×999829969² = 1999319933821081922, which contains 22 as substring.

Together with 999829967, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 999829898 and 999829907.

It is not a weakly prime, because it can be changed into another prime (999829967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499914984 + 499914985.

It is an arithmetic number, because the mean of its divisors is an integer number (499914985).

Almost surely, 2^999829969 is an apocalyptic number.

It is an amenable number.

999829969 is a deficient number, since it is larger than the sum of its proper divisors (1).

999829969 is an equidigital number, since it uses as much as digits as its factorization.

999829969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51018336, while the sum is 70.

The square root of 999829969 is about 31620.0880612309. The cubic root of 999829969 is about 999.9433197874.

The spelling of 999829969 in words is "nine hundred ninety-nine million, eight hundred twenty-nine thousand, nine hundred sixty-nine".