50004991 has 2 divisors, whose sum is σ = 50004992. Its totient is φ = 50004990.

The previous prime is 50004989. The next prime is 50005027. The reversal of 50004991 is 19940005.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50004991 - 2¹ = 50004989 is a prime.

Together with 50004989, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50004391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25002495 + 25002496.

It is an arithmetic number, because the mean of its divisors is an integer number (25002496).

Almost surely, 2^50004991 is an apocalyptic number.

50004991 is a deficient number, since it is larger than the sum of its proper divisors (1).

50004991 is an equidigital number, since it uses as much as digits as its factorization.

50004991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 50004991 is about 7071.4207200534. The cubic root of 50004991 is about 368.4154074570.

Adding to 50004991 its reverse (19940005), we get a palindrome (69944996).

The spelling of 50004991 in words is "fifty million, four thousand, nine hundred ninety-one".