89591265109 has 2 divisors, whose sum is σ = 89591265110. Its totient is φ = 89591265108.

The previous prime is 89591265103. The next prime is 89591265143. The reversal of 89591265109 is 90156219598.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85091807025 + 4499458084 = 291705^2 + 67078^2 .

It is a cyclic number.

It is not a de Polignac number, because 89591265109 - 2⁵ = 89591265077 is a prime.

It is a super-2 number, since 2×89591265109² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89591265109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89591265103) 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 as a sum of consecutive naturals, namely, 44795632554 + 44795632555.

It is an arithmetic number, because the mean of its divisors is an integer number (44795632555).

Almost surely, 2^89591265109 is an apocalyptic number.

It is an amenable number.

89591265109 is a deficient number, since it is larger than the sum of its proper divisors (1).

89591265109 is an equidigital number, since it uses as much as digits as its factorization.

89591265109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1749600, while the sum is 55.

The spelling of 89591265109 in words is "eighty-nine billion, five hundred ninety-one million, two hundred sixty-five thousand, one hundred nine".