1068713581 has 12 divisors (see below), whose sum is σ = 1159484340. Its totient is φ = 984597120.

The previous prime is 1068713579. The next prime is 1068713603. The reversal of 1068713581 is 1853178601.

It can be written as a sum of positive squares in 6 ways, for example, as 9796900 + 1058916681 = 3130^2 + 32541^2 .

It is not a de Polignac number, because 1068713581 - 2¹ = 1068713579 is a prime.

It is a super-2 number, since 2×1068713581² = 2284297436427687122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068713981) 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 in 11 ways as a sum of consecutive naturals, for example, 85585 + ... + 97273.

It is an arithmetic number, because the mean of its divisors is an integer number (96623695).

Almost surely, 2^1068713581 is an apocalyptic number.

It is an amenable number.

1068713581 is a deficient number, since it is larger than the sum of its proper divisors (90770759).

1068713581 is a wasteful number, since it uses less digits than its factorization.

1068713581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12256 (or 12243 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 1068713581 is about 32691.1850657023. The cubic root of 1068713581 is about 1022.3990629734.

The spelling of 1068713581 in words is "one billion, sixty-eight million, seven hundred thirteen thousand, five hundred eighty-one".