291080129 has 2 divisors, whose sum is σ = 291080130. Its totient is φ = 291080128.

The previous prime is 291080123. The next prime is 291080159. The reversal of 291080129 is 921080192.

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., 212722225 + 78357904 = 14585^2 + 8852^2 .

It is a cyclic number.

It is not a de Polignac number, because 291080129 - 2⁴ = 291080113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 291080095 and 291080104.

It is not a weakly prime, because it can be changed into another prime (291080123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145540064 + 145540065.

It is an arithmetic number, because the mean of its divisors is an integer number (145540065).

Almost surely, 2^291080129 is an apocalyptic number.

It is an amenable number.

291080129 is a deficient number, since it is larger than the sum of its proper divisors (1).

291080129 is an equidigital number, since it uses as much as digits as its factorization.

291080129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 291080129 is about 17061.0705701606. The cubic root of 291080129 is about 662.7313569087.

The spelling of 291080129 in words is "two hundred ninety-one million, eighty thousand, one hundred twenty-nine".