915448769 has 2 divisors, whose sum is σ = 915448770. Its totient is φ = 915448768.

The previous prime is 915448763. The next prime is 915448789. The reversal of 915448769 is 967844519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 891321025 + 24127744 = 29855^2 + 4912^2 .

It is a cyclic number.

It is not a de Polignac number, because 915448769 - 2⁴ = 915448753 is a prime.

It is a super-2 number, since 2×915448769² = 1676092897327230722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 915448769.

It is not a weakly prime, because it can be changed into another prime (915448763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457724384 + 457724385.

It is an arithmetic number, because the mean of its divisors is an integer number (457724385).

Almost surely, 2^915448769 is an apocalyptic number.

It is an amenable number.

915448769 is a deficient number, since it is larger than the sum of its proper divisors (1).

915448769 is an equidigital number, since it uses as much as digits as its factorization.

915448769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 915448769 is about 30256.3839379394. The cubic root of 915448769 is about 970.9823784694.

The spelling of 915448769 in words is "nine hundred fifteen million, four hundred forty-eight thousand, seven hundred sixty-nine".