11678989 has 4 divisors (see below), whose sum is σ = 13347424. Its totient is φ = 10010556.

The previous prime is 11678987. The next prime is 11678993. The reversal of 11678989 is 98987611.

11678989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98987611 = 5783 ⋅17117.

It is a cyclic number.

It is not a de Polignac number, because 11678989 - 2¹ = 11678987 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 (11678981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834207 + ... + 834220.

It is an arithmetic number, because the mean of its divisors is an integer number (3336856).

Almost surely, 2^11678989 is an apocalyptic number.

It is an amenable number.

11678989 is a deficient number, since it is larger than the sum of its proper divisors (1668435).

11678989 is an equidigital number, since it uses as much as digits as its factorization.

11678989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668434.

The product of its digits is 217728, while the sum is 49.

The square root of 11678989 is about 3417.4535841764. The cubic root of 11678989 is about 226.8828922368.

The spelling of 11678989 in words is "eleven million, six hundred seventy-eight thousand, nine hundred eighty-nine".