50688509 has 4 divisors (see below), whose sum is σ = 53670204. Its totient is φ = 47706816.

The previous prime is 50688497. The next prime is 50688541. The reversal of 50688509 is 90588605.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46963609 + 3724900 = 6853^2 + 1930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50688509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50688559) 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, 1490822 + ... + 1490855.

It is an arithmetic number, because the mean of its divisors is an integer number (13417551).

Almost surely, 2^50688509 is an apocalyptic number.

It is an amenable number.

50688509 is a deficient number, since it is larger than the sum of its proper divisors (2981695).

50688509 is a wasteful number, since it uses less digits than its factorization.

50688509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981694.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 50688509 is about 7119.5862941606. The cubic root of 50688509 is about 370.0864395074.

The spelling of 50688509 in words is "fifty million, six hundred eighty-eight thousand, five hundred nine".