11930809 has 12 divisors (see below), whose sum is σ = 13325328. Its totient is φ = 10593800.

The previous prime is 11930801. The next prime is 11930839. The reversal of 11930809 is 90803911.

11930809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11930809 - 2³ = 11930801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11930801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24054 + ... + 24544.

It is an arithmetic number, because the mean of its divisors is an integer number (1110444).

Almost surely, 2^11930809 is an apocalyptic number.

It is an amenable number.

11930809 is a deficient number, since it is larger than the sum of its proper divisors (1394519).

11930809 is an equidigital number, since it uses as much as digits as its factorization.

11930809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 11930809 is about 3454.1003170145. The cubic root of 11930809 is about 228.5019782862.

The spelling of 11930809 in words is "eleven million, nine hundred thirty thousand, eight hundred nine".