915448789 has 2 divisors, whose sum is σ = 915448790. Its totient is φ = 915448788.

The previous prime is 915448769. The next prime is 915448799. The reversal of 915448789 is 987844519.

It is a happy number.

915448789 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., 612166564 + 303282225 = 24742^2 + 17415^2 .

It is a cyclic number.

It is not a de Polignac number, because 915448789 - 2⁵ = 915448757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (915448769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457724394 + 457724395.

It is an arithmetic number, because the mean of its divisors is an integer number (457724395).

Almost surely, 2^915448789 is an apocalyptic number.

It is an amenable number.

915448789 is a deficient number, since it is larger than the sum of its proper divisors (1).

915448789 is an equidigital number, since it uses as much as digits as its factorization.

915448789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 55.

The square root of 915448789 is about 30256.3842684482. The cubic root of 915448789 is about 970.9823855405.

The spelling of 915448789 in words is "nine hundred fifteen million, four hundred forty-eight thousand, seven hundred eighty-nine".