50020091 has 4 divisors (see below), whose sum is σ = 54567384. Its totient is φ = 45472800.

The previous prime is 50020063. The next prime is 50020121. The reversal of 50020091 is 19002005.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50020091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50020891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2273630 + ... + 2273651.

It is an arithmetic number, because the mean of its divisors is an integer number (13641846).

Almost surely, 2^50020091 is an apocalyptic number.

50020091 is a deficient number, since it is larger than the sum of its proper divisors (4547293).

50020091 is a wasteful number, since it uses less digits than its factorization.

50020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547292.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 50020091 is about 7072.4883174170. The cubic root of 50020091 is about 368.4524871743.

Adding to 50020091 its reverse (19002005), we get a palindrome (69022096).

The spelling of 50020091 in words is "fifty million, twenty thousand, ninety-one".