11974809 has 16 divisors (see below), whose sum is σ = 19906560. Its totient is φ = 6220560.

The previous prime is 11974799. The next prime is 11974813. The reversal of 11974809 is 90847911.

It is a happy number.

It is not a de Polignac number, because 11974809 - 2⁴ = 11974793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11974889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25689 + ... + 26150.

It is an arithmetic number, because the mean of its divisors is an integer number (1244160).

Almost surely, 2^11974809 is an apocalyptic number.

It is an amenable number.

11974809 is a deficient number, since it is larger than the sum of its proper divisors (7931751).

11974809 is a wasteful number, since it uses less digits than its factorization.

11974809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51860.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 11974809 is about 3460.4636972521. The cubic root of 11974809 is about 228.7825335196.

It can be divided in two parts, 1197 and 4809, that added together give a palindrome (6006).

The spelling of 11974809 in words is "eleven million, nine hundred seventy-four thousand, eight hundred nine".