11447789 has 2 divisors, whose sum is σ = 11447790. Its totient is φ = 11447788.

The previous prime is 11447771. The next prime is 11447801. The reversal of 11447789 is 98774411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10530025 + 917764 = 3245^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 11447789 - 2⁸ = 11447533 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11447759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5723894 + 5723895.

It is an arithmetic number, because the mean of its divisors is an integer number (5723895).

Almost surely, 2^11447789 is an apocalyptic number.

It is an amenable number.

11447789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11447789 is an equidigital number, since it uses as much as digits as its factorization.

11447789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 11447789 is about 3383.4581421971. The cubic root of 11447789 is about 225.3757605902.

The spelling of 11447789 in words is "eleven million, four hundred forty-seven thousand, seven hundred eighty-nine".