11623809 has 32 divisors (see below), whose sum is σ = 17291520. Its totient is φ = 6918912.

The previous prime is 11623793. The next prime is 11623813. The reversal of 11623809 is 90832611.

It is not a de Polignac number, because 11623809 - 2⁴ = 11623793 is a prime.

It is a super-2 number, since 2×11623809² = 270225871336962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11623819) 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 31 ways as a sum of consecutive naturals, for example, 73959 + ... + 74115.

It is an arithmetic number, because the mean of its divisors is an integer number (540360).

Almost surely, 2^11623809 is an apocalyptic number.

It is an amenable number.

11623809 is a deficient number, since it is larger than the sum of its proper divisors (5667711).

11623809 is a wasteful number, since it uses less digits than its factorization.

11623809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 11623809 is about 3409.3707630588. The cubic root of 11623809 is about 226.5250083249.

The spelling of 11623809 in words is "eleven million, six hundred twenty-three thousand, eight hundred nine".