999829997 has 2 divisors, whose sum is σ = 999829998. Its totient is φ = 999829996.

The previous prime is 999829969. The next prime is 999830009. The reversal of 999829997 is 799928999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895565476 + 104264521 = 29926^2 + 10211^2 .

It is a cyclic number.

It is not a de Polignac number, because 999829997 - 2¹² = 999825901 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999829997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999829907) 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, 499914998 + 499914999.

It is an arithmetic number, because the mean of its divisors is an integer number (499914999).

Almost surely, 2^999829997 is an apocalyptic number.

It is an amenable number.

999829997 is a deficient number, since it is larger than the sum of its proper divisors (1).

999829997 is an equidigital number, since it uses as much as digits as its factorization.

999829997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59521392, while the sum is 71.

The square root of 999829997 is about 31620.0885039875. The cubic root of 999829997 is about 999.9433291218.

The spelling of 999829997 in words is "nine hundred ninety-nine million, eight hundred twenty-nine thousand, nine hundred ninety-seven".