50891 has 2 divisors, whose sum is σ = 50892. Its totient is φ = 50890.

The previous prime is 50873. The next prime is 50893. The reversal of 50891 is 19805.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50891 is a prime.

Together with 50893, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (50893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25445 + 25446.

It is an arithmetic number, because the mean of its divisors is an integer number (25446).

2⁵⁰⁸⁹¹ is an apocalyptic number.

50891 is a deficient number, since it is larger than the sum of its proper divisors (1).

50891 is an equidigital number, since it uses as much as digits as its factorization.

50891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 50891 is about 225.5903366725. The cubic root of 50891 is about 37.0578593162.

The spelling of 50891 in words is "fifty thousand, eight hundred ninety-one".