1009781289 has 16 divisors (see below), whose sum is σ = 1631970240. Its totient is φ = 611988480.

The previous prime is 1009781233. The next prime is 1009781299. The reversal of 1009781289 is 9821879001.

It is not a de Polignac number, because 1009781289 - 2⁹ = 1009780777 is a prime.

It is a super-3 number, since 3×1009781289³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1009781209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1699672 + ... + 1700265.

It is an arithmetic number, because the mean of its divisors is an integer number (101998140).

Almost surely, 2^1009781289 is an apocalyptic number.

It is an amenable number.

1009781289 is a deficient number, since it is larger than the sum of its proper divisors (622188951).

1009781289 is a wasteful number, since it uses less digits than its factorization.

1009781289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399957 (or 3399951 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 1009781289 is about 31777.0560153076. The cubic root of 1009781289 is about 1003.2498566572.

The spelling of 1009781289 in words is "one billion, nine million, seven hundred eighty-one thousand, two hundred eighty-nine".