11989775 has 24 divisors (see below), whose sum is σ = 17153664. Its totient is φ = 8143200.

The previous prime is 11989763. The next prime is 11989781. The reversal of 11989775 is 57798911.

It is not a de Polignac number, because 11989775 - 2⁸ = 11989519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22664 + ... + 23186.

It is an arithmetic number, because the mean of its divisors is an integer number (714736).

Almost surely, 2^11989775 is an apocalyptic number.

11989775 is a deficient number, since it is larger than the sum of its proper divisors (5163889).

11989775 is a wasteful number, since it uses less digits than its factorization.

11989775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 666 counting only the distinct ones).

The product of its digits is 158760, while the sum is 47.

The square root of 11989775 is about 3462.6254489910. The cubic root of 11989775 is about 228.8778039042.

The spelling of 11989775 in words is "eleven million, nine hundred eighty-nine thousand, seven hundred seventy-five".