969439789 has 2 divisors, whose sum is σ = 969439790. Its totient is φ = 969439788.

The previous prime is 969439777. The next prime is 969439799. The reversal of 969439789 is 987934969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960690025 + 8749764 = 30995^2 + 2958^2 .

It is a cyclic number.

It is not a de Polignac number, because 969439789 - 2⁷ = 969439661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 969439789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (969439799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484719894 + 484719895.

It is an arithmetic number, because the mean of its divisors is an integer number (484719895).

Almost surely, 2^969439789 is an apocalyptic number.

It is an amenable number.

969439789 is a deficient number, since it is larger than the sum of its proper divisors (1).

969439789 is an equidigital number, since it uses as much as digits as its factorization.

969439789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26453952, while the sum is 64.

The square root of 969439789 is about 31135.8280602909. The cubic root of 969439789 is about 989.7076948819.

The spelling of 969439789 in words is "nine hundred sixty-nine million, four hundred thirty-nine thousand, seven hundred eighty-nine".