91161000589 has 2 divisors, whose sum is σ = 91161000590. Its totient is φ = 91161000588.

The previous prime is 91161000571. The next prime is 91161000629. The reversal of 91161000589 is 98500016119.

It is an a-pointer prime, because the next prime (91161000629) can be obtained adding 91161000589 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87542015625 + 3618984964 = 295875^2 + 60158^2 .

It is a cyclic number.

It is not a de Polignac number, because 91161000589 - 2²³ = 91152611981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91161000509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45580500294 + 45580500295.

It is an arithmetic number, because the mean of its divisors is an integer number (45580500295).

Almost surely, 2^91161000589 is an apocalyptic number.

It is an amenable number.

91161000589 is a deficient number, since it is larger than the sum of its proper divisors (1).

91161000589 is an equidigital number, since it uses as much as digits as its factorization.

91161000589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 91161000589 in words is "ninety-one billion, one hundred sixty-one million, five hundred eighty-nine", and thus it is an aban number.