11989767 has 4 divisors (see below), whose sum is σ = 15986360. Its totient is φ = 7993176.

The previous prime is 11989763. The next prime is 11989781. The reversal of 11989767 is 76798911.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11989767 - 2² = 11989763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989763) 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, 1998292 + ... + 1998297.

It is an arithmetic number, because the mean of its divisors is an integer number (3996590).

Almost surely, 2^11989767 is an apocalyptic number.

11989767 is a deficient number, since it is larger than the sum of its proper divisors (3996593).

11989767 is an equidigital number, since it uses as much as digits as its factorization.

11989767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996592.

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

The square root of 11989767 is about 3462.6242937980. The cubic root of 11989767 is about 228.8777529991.

The spelling of 11989767 in words is "eleven million, nine hundred eighty-nine thousand, seven hundred sixty-seven".