50099809 has 4 divisors (see below), whose sum is σ = 50115780. Its totient is φ = 50083840.

The previous prime is 50099807. The next prime is 50099839. The reversal of 50099809 is 90899005.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90899005 = 5 ⋅18179801.

It can be written as a sum of positive squares in 2 ways, for example, as 38093584 + 12006225 = 6172^2 + 3465^2 .

It is a cyclic number.

It is not a de Polignac number, because 50099809 - 2¹ = 50099807 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50099807) 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, 1552 + ... + 10129.

It is an arithmetic number, because the mean of its divisors is an integer number (12528945).

Almost surely, 2^50099809 is an apocalyptic number.

It is an amenable number.

50099809 is a deficient number, since it is larger than the sum of its proper divisors (15971).

50099809 is a wasteful number, since it uses less digits than its factorization.

50099809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15970.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 50099809 is about 7078.1218554077. The cubic root of 50099809 is about 368.6481199347.

The spelling of 50099809 in words is "fifty million, ninety-nine thousand, eight hundred nine".