50909891 has 8 divisors (see below), whose sum is σ = 52950720. Its totient is φ = 48904128.

The previous prime is 50909857. The next prime is 50909897. The reversal of 50909891 is 19890905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50909891 - 2⁶ = 50909827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50909897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5786 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (6618840).

Almost surely, 2^50909891 is an apocalyptic number.

50909891 is a deficient number, since it is larger than the sum of its proper divisors (2040829).

50909891 is a wasteful number, since it uses less digits than its factorization.

50909891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17533.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 50909891 is about 7135.1167474681. The cubic root of 50909891 is about 370.6244410469.

The spelling of 50909891 in words is "fifty million, nine hundred nine thousand, eight hundred ninety-one".