291980159 has 2 divisors, whose sum is σ = 291980160. Its totient is φ = 291980158.

The previous prime is 291980137. The next prime is 291980189. The reversal of 291980159 is 951089192.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 291980159 - 2²⁴ = 275202943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291980119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145990079 + 145990080.

It is an arithmetic number, because the mean of its divisors is an integer number (145990080).

Almost surely, 2^291980159 is an apocalyptic number.

291980159 is a deficient number, since it is larger than the sum of its proper divisors (1).

291980159 is an equidigital number, since it uses as much as digits as its factorization.

291980159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 291980159 is about 17087.4269274224. The cubic root of 291980159 is about 663.4137169883.

The spelling of 291980159 in words is "two hundred ninety-one million, nine hundred eighty thousand, one hundred fifty-nine".