50947891 has 2 divisors, whose sum is σ = 50947892. Its totient is φ = 50947890.

The previous prime is 50947889. The next prime is 50947901. The reversal of 50947891 is 19874905.

50947891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50947891 - 2¹ = 50947889 is a prime.

Together with 50947889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (50947801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25473945 + 25473946.

It is an arithmetic number, because the mean of its divisors is an integer number (25473946).

Almost surely, 2^50947891 is an apocalyptic number.

50947891 is a deficient number, since it is larger than the sum of its proper divisors (1).

50947891 is an equidigital number, since it uses as much as digits as its factorization.

50947891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 50947891 is about 7137.7791363981. The cubic root of 50947891 is about 370.7166315546.

It can be divided in two parts, 509 and 47891, that added together give a square (48400 = 220²).

The spelling of 50947891 in words is "fifty million, nine hundred forty-seven thousand, eight hundred ninety-one".