11868309 has 8 divisors (see below), whose sum is σ = 17582720. Its totient is φ = 7912188.

The previous prime is 11868287. The next prime is 11868317. The reversal of 11868309 is 90386811.

It is not a de Polignac number, because 11868309 - 2⁹ = 11867797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11868349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219757 + ... + 219810.

It is an arithmetic number, because the mean of its divisors is an integer number (2197840).

Almost surely, 2^11868309 is an apocalyptic number.

It is an amenable number.

11868309 is a deficient number, since it is larger than the sum of its proper divisors (5714411).

11868309 is an equidigital number, since it uses as much as digits as its factorization.

11868309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439576 (or 439570 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 11868309 is about 3445.0412189116. The cubic root of 11868309 is about 228.1022740606.

The spelling of 11868309 in words is "eleven million, eight hundred sixty-eight thousand, three hundred nine".