50909091 has 4 divisors (see below), whose sum is σ = 67878792. Its totient is φ = 33939392.

The previous prime is 50909087. The next prime is 50909107. The reversal of 50909091 is 19090905.

50909091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 50909091 - 2² = 50909087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50909011) 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 in 3 ways as a sum of consecutive naturals, for example, 8484846 + ... + 8484851.

It is an arithmetic number, because the mean of its divisors is an integer number (16969698).

Almost surely, 2^50909091 is an apocalyptic number.

50909091 is a deficient number, since it is larger than the sum of its proper divisors (16969701).

50909091 is a wasteful number, since it uses less digits than its factorization.

50909091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16969700.

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 50909091 is about 7135.0606864973. The cubic root of 50909091 is about 370.6224997011.

Adding to 50909091 its reverse (19090905), we get a palindrome (69999996).

The spelling of 50909091 in words is "fifty million, nine hundred nine thousand, ninety-one".