50139966 has 16 divisors (see below), whose sum is σ = 102726288. Its totient is φ = 16305600.

The previous prime is 50139949. The next prime is 50140001. The reversal of 50139966 is 66993105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101665 + ... + 102156.

It is an arithmetic number, because the mean of its divisors is an integer number (6420393).

Almost surely, 2^50139966 is an apocalyptic number.

50139966 is an abundant number, since it is smaller than the sum of its proper divisors (52586322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50139966 is a wasteful number, since it uses less digits than its factorization.

50139966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203867.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 50139966 is about 7080.9579860355. The cubic root of 50139966 is about 368.7465890329.

The spelling of 50139966 in words is "fifty million, one hundred thirty-nine thousand, nine hundred sixty-six".