50457809 has 4 divisors (see below), whose sum is σ = 50598720. Its totient is φ = 50316900.

The previous prime is 50457793. The next prime is 50457811. The reversal of 50457809 is 90875405.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90875405 = 5 ⋅18175081.

It is a cyclic number.

It is not a de Polignac number, because 50457809 - 2⁴ = 50457793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50457859) 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, 69917 + ... + 70634.

It is an arithmetic number, because the mean of its divisors is an integer number (12649680).

Almost surely, 2^50457809 is an apocalyptic number.

It is an amenable number.

50457809 is a deficient number, since it is larger than the sum of its proper divisors (140911).

50457809 is a wasteful number, since it uses less digits than its factorization.

50457809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140910.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 50457809 is about 7103.3660330860. The cubic root of 50457809 is about 369.5241240308.

The spelling of 50457809 in words is "fifty million, four hundred fifty-seven thousand, eight hundred nine".