11638789 has 2 divisors, whose sum is σ = 11638790. Its totient is φ = 11638788.

The previous prime is 11638777. The next prime is 11638799. The reversal of 11638789 is 98783611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 146689 = 3390^2 + 383^2 .

It is an emirp because it is prime and its reverse (98783611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11638789 - 2¹¹ = 11636741 is a prime.

It is a super-2 number, since 2×11638789² = 270922818773042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819394 + 5819395.

It is an arithmetic number, because the mean of its divisors is an integer number (5819395).

Almost surely, 2^11638789 is an apocalyptic number.

It is an amenable number.

11638789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638789 is an equidigital number, since it uses as much as digits as its factorization.

11638789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 11638789 is about 3411.5669420370. The cubic root of 11638789 is about 226.6222767264.

The spelling of 11638789 in words is "eleven million, six hundred thirty-eight thousand, seven hundred eighty-nine".