127793809 has 16 divisors (see below), whose sum is σ = 150454080. Its totient is φ = 107012160.

The previous prime is 127793801. The next prime is 127793821. The reversal of 127793809 is 908397721.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 127793809 - 2³ = 127793801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127793801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124902 + ... + 125920.

It is an arithmetic number, because the mean of its divisors is an integer number (9403380).

Almost surely, 2^127793809 is an apocalyptic number.

It is an amenable number.

127793809 is a deficient number, since it is larger than the sum of its proper divisors (22660271).

127793809 is a wasteful number, since it uses less digits than its factorization.

127793809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 127793809 is about 11304.5923853981. The cubic root of 127793809 is about 503.6976657924.

The spelling of 127793809 in words is "one hundred twenty-seven million, seven hundred ninety-three thousand, eight hundred nine".