1017891089 has 2 divisors, whose sum is σ = 1017891090. Its totient is φ = 1017891088.

The previous prime is 1017891041. The next prime is 1017891101. The reversal of 1017891089 is 9801987101.

1017891089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012321489 + 5569600 = 31817^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1017891089 - 2¹² = 1017886993 is a prime.

It is a super-2 number, since 2×1017891089² = 2072204538131211842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1017891019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508945544 + 508945545.

It is an arithmetic number, because the mean of its divisors is an integer number (508945545).

Almost surely, 2^1017891089 is an apocalyptic number.

It is an amenable number.

1017891089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1017891089 is an equidigital number, since it uses as much as digits as its factorization.

1017891089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 44.

The square root of 1017891089 is about 31904.4054794945. The cubic root of 1017891089 is about 1005.9284800023.

The spelling of 1017891089 in words is "one billion, seventeen million, eight hundred ninety-one thousand, eighty-nine".