11989873 has 4 divisors (see below), whose sum is σ = 13702720. Its totient is φ = 10277028.

The previous prime is 11989837. The next prime is 11989883. The reversal of 11989873 is 37898911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11989873 - 2¹⁷ = 11858801 is a prime.

It is a super-2 number, since 2×11989873² = 287514109112258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11989823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856413 + ... + 856426.

It is an arithmetic number, because the mean of its divisors is an integer number (3425680).

Almost surely, 2^11989873 is an apocalyptic number.

It is an amenable number.

11989873 is a deficient number, since it is larger than the sum of its proper divisors (1712847).

11989873 is an equidigital number, since it uses as much as digits as its factorization.

11989873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712846.

The product of its digits is 108864, while the sum is 46.

The square root of 11989873 is about 3462.6396000739. The cubic root of 11989873 is about 228.8784274901.

The spelling of 11989873 in words is "eleven million, nine hundred eighty-nine thousand, eight hundred seventy-three".