50809139 has 8 divisors (see below), whose sum is σ = 54019872. Its totient is φ = 47681920.

The previous prime is 50809117. The next prime is 50809159. The reversal of 50809139 is 93190805.

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 50809139 - 2⁸ = 50808883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50809099 and 50809108.

It is not an unprimeable number, because it can be changed into a prime (50809159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19622 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (6752484).

Almost surely, 2^50809139 is an apocalyptic number.

50809139 is a deficient number, since it is larger than the sum of its proper divisors (3210733).

50809139 is a wasteful number, since it uses less digits than its factorization.

50809139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41757.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 50809139 is about 7128.0529599604. The cubic root of 50809139 is about 370.3797877775.

The spelling of 50809139 in words is "fifty million, eight hundred nine thousand, one hundred thirty-nine".