180809029 has 2 divisors, whose sum is σ = 180809030. Its totient is φ = 180809028.

The previous prime is 180809021. The next prime is 180809039. The reversal of 180809029 is 920908081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175960225 + 4848804 = 13265^2 + 2202^2 .

It is a cyclic number.

It is not a de Polignac number, because 180809029 - 2³ = 180809021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180809021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90404514 + 90404515.

It is an arithmetic number, because the mean of its divisors is an integer number (90404515).

Almost surely, 2^180809029 is an apocalyptic number.

It is an amenable number.

180809029 is a deficient number, since it is larger than the sum of its proper divisors (1).

180809029 is an equidigital number, since it uses as much as digits as its factorization.

180809029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 180809029 is about 13446.5247926741. The cubic root of 180809029 is about 565.4662702818.

The spelling of 180809029 in words is "one hundred eighty million, eight hundred nine thousand, twenty-nine".