11814989 has 2 divisors, whose sum is σ = 11814990. Its totient is φ = 11814988.

The previous prime is 11814973. The next prime is 11814991. The reversal of 11814989 is 98941811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7645225 + 4169764 = 2765^2 + 2042^2 .

It is a cyclic number.

It is not a de Polignac number, because 11814989 - 2⁴ = 11814973 is a prime.

It is a Sophie Germain prime.

Together with 11814991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p₇₇₆₆₉₆ and since 11814989 and 776696 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11814589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5907494 + 5907495.

It is an arithmetic number, because the mean of its divisors is an integer number (5907495).

Almost surely, 2^11814989 is an apocalyptic number.

It is an amenable number.

11814989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11814989 is an equidigital number, since it uses as much as digits as its factorization.

11814989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 41.

The square root of 11814989 is about 3437.2938483639. The cubic root of 11814989 is about 227.7601676826.

The spelling of 11814989 in words is "eleven million, eight hundred fourteen thousand, nine hundred eighty-nine".