1008728969 has 2 divisors, whose sum is σ = 1008728970. Its totient is φ = 1008728968.

The previous prime is 1008728921. The next prime is 1008729013. The reversal of 1008728969 is 9698278001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586220944 + 422508025 = 24212^2 + 20555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1008728969 is a prime.

It is a super-2 number, since 2×1008728969² = 2035068265799605922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1008722969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504364484 + 504364485.

It is an arithmetic number, because the mean of its divisors is an integer number (504364485).

Almost surely, 2^1008728969 is an apocalyptic number.

It is an amenable number.

1008728969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008728969 is an equidigital number, since it uses as much as digits as its factorization.

1008728969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 1008728969 is about 31760.4938406190. The cubic root of 1008728969 is about 1002.9012310517.

The spelling of 1008728969 in words is "one billion, eight million, seven hundred twenty-eight thousand, nine hundred sixty-nine".