999210829 has 2 divisors, whose sum is σ = 999210830. Its totient is φ = 999210828.

The previous prime is 999210811. The next prime is 999210841. The reversal of 999210829 is 928012999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 918696100 + 80514729 = 30310^2 + 8973^2 .

It is a cyclic number.

It is not a de Polignac number, because 999210829 - 2¹¹ = 999208781 is a prime.

It is a super-3 number, since 3×999210829³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999210809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499605414 + 499605415.

It is an arithmetic number, because the mean of its divisors is an integer number (499605415).

Almost surely, 2^999210829 is an apocalyptic number.

It is an amenable number.

999210829 is a deficient number, since it is larger than the sum of its proper divisors (1).

999210829 is an equidigital number, since it uses as much as digits as its factorization.

999210829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 999210829 is about 31610.2962497981. The cubic root of 999210829 is about 999.7368737707.

The spelling of 999210829 in words is "nine hundred ninety-nine million, two hundred ten thousand, eight hundred twenty-nine".