11673639 has 20 divisors (see below), whose sum is σ = 18004800. Its totient is φ = 7529760.

The previous prime is 11673617. The next prime is 11673653. The reversal of 11673639 is 93637611.

11673639 is a `hidden beast` number, since 1 + 16 + 7 + 3 + 639 = 666.

It is not a de Polignac number, because 11673639 - 2⁸ = 11673383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11673139) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 187 + ... + 4835.

It is an arithmetic number, because the mean of its divisors is an integer number (900240).

Almost surely, 2^11673639 is an apocalyptic number.

11673639 is a deficient number, since it is larger than the sum of its proper divisors (6331161).

11673639 is an equidigital number, since it uses as much as digits as its factorization.

11673639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692 (or 4683 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 11673639 is about 3416.6707479650. The cubic root of 11673639 is about 226.8482428659.

The spelling of 11673639 in words is "eleven million, six hundred seventy-three thousand, six hundred thirty-nine".