1009468561 has 2 divisors, whose sum is σ = 1009468562. Its totient is φ = 1009468560.

The previous prime is 1009468553. The next prime is 1009468567. The reversal of 1009468561 is 1658649001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999508225 + 9960336 = 31615^2 + 3156^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009468561 - 2³ = 1009468553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1009468567) 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, 504734280 + 504734281.

It is an arithmetic number, because the mean of its divisors is an integer number (504734281).

Almost surely, 2^1009468561 is an apocalyptic number.

It is an amenable number.

1009468561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009468561 is an equidigital number, since it uses as much as digits as its factorization.

1009468561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1009468561 is about 31772.1349770518. The cubic root of 1009468561 is about 1003.1462775558.

The spelling of 1009468561 in words is "one billion, nine million, four hundred sixty-eight thousand, five hundred sixty-one".