11399989 has 2 divisors, whose sum is σ = 11399990. Its totient is φ = 11399988.

The previous prime is 11399977. The next prime is 11400017. The reversal of 11399989 is 98999311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9253764 + 2146225 = 3042^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 11399989 - 2⁵ = 11399957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11399939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5699994 + 5699995.

It is an arithmetic number, because the mean of its divisors is an integer number (5699995).

Almost surely, 2^11399989 is an apocalyptic number.

It is an amenable number.

11399989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11399989 is an equidigital number, since it uses as much as digits as its factorization.

11399989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 49.

The square root of 11399989 is about 3376.3869742670. The cubic root of 11399989 is about 225.0616390794.

The spelling of 11399989 in words is "eleven million, three hundred ninety-nine thousand, nine hundred eighty-nine".