291371 has 2 divisors, whose sum is σ = 291372. Its totient is φ = 291370.

The previous prime is 291367. The next prime is 291373. The reversal of 291371 is 173192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 291371 - 2² = 291367 is a prime.

Together with 291373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (291373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145685 + 145686.

It is an arithmetic number, because the mean of its divisors is an integer number (145686).

2²⁹¹³⁷¹ is an apocalyptic number.

291371 is a deficient number, since it is larger than the sum of its proper divisors (1).

291371 is an equidigital number, since it uses as much as digits as its factorization.

291371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 23.

The square root of 291371 is about 539.7879213173. The cubic root of 291371 is about 66.2952035156.

The spelling of 291371 in words is "two hundred ninety-one thousand, three hundred seventy-one".