805529129 has 2 divisors, whose sum is σ = 805529130. Its totient is φ = 805529128.

The previous prime is 805529119. The next prime is 805529167. The reversal of 805529129 is 921925508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 764633104 + 40896025 = 27652^2 + 6395^2 .

It is a cyclic number.

It is not a de Polignac number, because 805529129 - 2²⁰ = 804480553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (805529119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402764564 + 402764565.

It is an arithmetic number, because the mean of its divisors is an integer number (402764565).

Almost surely, 2^805529129 is an apocalyptic number.

It is an amenable number.

805529129 is a deficient number, since it is larger than the sum of its proper divisors (1).

805529129 is an equidigital number, since it uses as much as digits as its factorization.

805529129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 805529129 is about 28381.8450598265. The cubic root of 805529129 is about 930.4515204489.

The spelling of 805529129 in words is "eight hundred five million, five hundred twenty-nine thousand, one hundred twenty-nine".