50169991 has 2 divisors, whose sum is σ = 50169992. Its totient is φ = 50169990.

The previous prime is 50169989. The next prime is 50170027. The reversal of 50169991 is 19996105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50169991 - 2¹ = 50169989 is a prime.

Together with 50169989, 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 (50119991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25084995 + 25084996.

It is an arithmetic number, because the mean of its divisors is an integer number (25084996).

Almost surely, 2^50169991 is an apocalyptic number.

50169991 is a deficient number, since it is larger than the sum of its proper divisors (1).

50169991 is an equidigital number, since it uses as much as digits as its factorization.

50169991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 50169991 is about 7083.0777914689. The cubic root of 50169991 is about 368.8201790781.

The spelling of 50169991 in words is "fifty million, one hundred sixty-nine thousand, nine hundred ninety-one".