12090813 has 8 divisors (see below), whose sum is σ = 18424128. Its totient is φ = 6909024.

The previous prime is 12090787. The next prime is 12090817. The reversal of 12090813 is 31809021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12090813 - 2⁸ = 12090557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12090817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287856 + ... + 287897.

It is an arithmetic number, because the mean of its divisors is an integer number (2303016).

Almost surely, 2^12090813 is an apocalyptic number.

It is an amenable number.

12090813 is a deficient number, since it is larger than the sum of its proper divisors (6333315).

12090813 is an equidigital number, since it uses as much as digits as its factorization.

12090813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575763.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 12090813 is about 3477.1846370304. The cubic root of 12090813 is about 229.5189251579.

Adding to 12090813 its reverse (31809021), we get a palindrome (43899834).

The spelling of 12090813 in words is "twelve million, ninety thousand, eight hundred thirteen".