999129829 has 2 divisors, whose sum is σ = 999129830. Its totient is φ = 999129828.

The previous prime is 999129823. The next prime is 999129883. The reversal of 999129829 is 928921999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544288900 + 454840929 = 23330^2 + 21327^2 .

It is a cyclic number.

It is not a de Polignac number, because 999129829 - 2²⁷ = 864912101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999129823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499564914 + 499564915.

It is an arithmetic number, because the mean of its divisors is an integer number (499564915).

Almost surely, 2^999129829 is an apocalyptic number.

It is an amenable number.

999129829 is a deficient number, since it is larger than the sum of its proper divisors (1).

999129829 is an equidigital number, since it uses as much as digits as its factorization.

999129829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 58.

The square root of 999129829 is about 31609.0149957255. The cubic root of 999129829 is about 999.7098588262.

The spelling of 999129829 in words is "nine hundred ninety-nine million, one hundred twenty-nine thousand, eight hundred twenty-nine".