291880241 has 2 divisors, whose sum is σ = 291880242. Its totient is φ = 291880240.

The previous prime is 291880229. The next prime is 291880301. The reversal of 291880241 is 142088192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146918641 + 144961600 = 12121^2 + 12040^2 .

It is a cyclic number.

It is not a de Polignac number, because 291880241 - 2¹⁴ = 291863857 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (291880201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145940120 + 145940121.

It is an arithmetic number, because the mean of its divisors is an integer number (145940121).

Almost surely, 2^291880241 is an apocalyptic number.

It is an amenable number.

291880241 is a deficient number, since it is larger than the sum of its proper divisors (1).

291880241 is an equidigital number, since it uses as much as digits as its factorization.

291880241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 291880241 is about 17084.5029485789. The cubic root of 291880241 is about 663.3380331533.

The spelling of 291880241 in words is "two hundred ninety-one million, eight hundred eighty thousand, two hundred forty-one".