789449789 has 2 divisors, whose sum is σ = 789449790. Its totient is φ = 789449788.

The previous prime is 789449767. The next prime is 789449809. The reversal of 789449789 is 987944987.

789449789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612958564 + 176491225 = 24758^2 + 13285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789449789 is a prime.

It is a Sophie Germain 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 (789469789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394724894 + 394724895.

It is an arithmetic number, because the mean of its divisors is an integer number (394724895).

Almost surely, 2^789449789 is an apocalyptic number.

It is an amenable number.

789449789 is a deficient number, since it is larger than the sum of its proper divisors (1).

789449789 is an equidigital number, since it uses as much as digits as its factorization.

789449789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 65.

The square root of 789449789 is about 28097.1491258455. The cubic root of 789449789 is about 924.2188834008.

It can be divided in two parts, 78944978 and 9, that added together give a palindrome (78944987).

The spelling of 789449789 in words is "seven hundred eighty-nine million, four hundred forty-nine thousand, seven hundred eighty-nine".