11679989 has 2 divisors, whose sum is σ = 11679990. Its totient is φ = 11679988.

The previous prime is 11679971. The next prime is 11679991. The reversal of 11679989 is 98997611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9672100 + 2007889 = 3110^2 + 1417^2 .

It is an emirp because it is prime and its reverse (98997611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11679989 is a prime.

It is a super-4 number, since 4×11679989⁴ (a number of 29 digits) contains 4444 as substring.

It is a Sophie Germain prime.

Together with 11679991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11679919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5839994 + 5839995.

It is an arithmetic number, because the mean of its divisors is an integer number (5839995).

Almost surely, 2^11679989 is an apocalyptic number.

It is an amenable number.

11679989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11679989 is an equidigital number, since it uses as much as digits as its factorization.

11679989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 50.

The square root of 11679989 is about 3417.5998888109. The cubic root of 11679989 is about 226.8893675809.

The spelling of 11679989 in words is "eleven million, six hundred seventy-nine thousand, nine hundred eighty-nine".