11969787 has 4 divisors (see below), whose sum is σ = 15959720. Its totient is φ = 7979856.

The previous prime is 11969777. The next prime is 11969801. The reversal of 11969787 is 78796911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78796911 = 3 ⋅26265637.

It is not a de Polignac number, because 11969787 - 2⁶ = 11969723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11969777) 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, 1994962 + ... + 1994967.

It is an arithmetic number, because the mean of its divisors is an integer number (3989930).

Almost surely, 2^11969787 is an apocalyptic number.

11969787 is a deficient number, since it is larger than the sum of its proper divisors (3989933).

11969787 is an equidigital number, since it uses as much as digits as its factorization.

11969787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989932.

The product of its digits is 190512, while the sum is 48.

The square root of 11969787 is about 3459.7379958604. The cubic root of 11969787 is about 228.7505467454.

The spelling of 11969787 in words is "eleven million, nine hundred sixty-nine thousand, seven hundred eighty-seven".