291043 has 2 divisors, whose sum is σ = 291044. Its totient is φ = 291042.

The previous prime is 291041. The next prime is 291077. The reversal of 291043 is 340192.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 291043 - 2¹ = 291041 is a prime.

Together with 291041, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 291043.

It is not a weakly prime, because it can be changed into another prime (291041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145521 + 145522.

It is an arithmetic number, because the mean of its divisors is an integer number (145522).

2²⁹¹⁰⁴³ is an apocalyptic number.

291043 is a deficient number, since it is larger than the sum of its proper divisors (1).

291043 is an equidigital number, since it uses as much as digits as its factorization.

291043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 291043 is about 539.4840127381. The cubic root of 291043 is about 66.2703177270.

The spelling of 291043 in words is "two hundred ninety-one thousand, forty-three".