801999829 has 2 divisors, whose sum is σ = 801999830. Its totient is φ = 801999828.

The previous prime is 801999797. The next prime is 801999911. The reversal of 801999829 is 928999108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686544804 + 115455025 = 26202^2 + 10745^2 .

It is a cyclic number.

It is not a de Polignac number, because 801999829 - 2⁵ = 801999797 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 801999829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801999229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400999914 + 400999915.

It is an arithmetic number, because the mean of its divisors is an integer number (400999915).

Almost surely, 2^801999829 is an apocalyptic number.

It is an amenable number.

801999829 is a deficient number, since it is larger than the sum of its proper divisors (1).

801999829 is an equidigital number, since it uses as much as digits as its factorization.

801999829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 801999829 is about 28319.6014979025. The cubic root of 801999829 is about 929.0906550576.

The spelling of 801999829 in words is "eight hundred one million, nine hundred ninety-nine thousand, eight hundred twenty-nine".