1006081789 has 4 divisors (see below), whose sum is σ = 1009822140. Its totient is φ = 1002341440.

The previous prime is 1006081771. The next prime is 1006081799. The reversal of 1006081789 is 9871806001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9871806001 = 163 ⋅60563227.

It can be written as a sum of positive squares in 2 ways, for example, as 287573764 + 718508025 = 16958^2 + 26805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006081789 - 2⁵ = 1006081757 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006081729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1869772 + ... + 1870309.

It is an arithmetic number, because the mean of its divisors is an integer number (252455535).

Almost surely, 2^1006081789 is an apocalyptic number.

It is an amenable number.

1006081789 is a deficient number, since it is larger than the sum of its proper divisors (3740351).

1006081789 is an equidigital number, since it uses as much as digits as its factorization.

1006081789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740350.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 1006081789 is about 31718.7923635185. The cubic root of 1006081789 is about 1002.0231670347.

The spelling of 1006081789 in words is "one billion, six million, eighty-one thousand, seven hundred eighty-nine".