89066991 has 16 divisors (see below), whose sum is σ = 128564576. Its totient is φ = 54521856.

The previous prime is 89066987. The next prime is 89067007. The reversal of 89066991 is 19966098.

It is not a de Polignac number, because 89066991 - 2² = 89066987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89066991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89066911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611 + ... + 13443.

It is an arithmetic number, because the mean of its divisors is an integer number (8035286).

Almost surely, 2^89066991 is an apocalyptic number.

89066991 is a deficient number, since it is larger than the sum of its proper divisors (39497585).

89066991 is a wasteful number, since it uses less digits than its factorization.

89066991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12042.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 89066991 is about 9437.5309800816. The cubic root of 89066991 is about 446.5865030887.

The spelling of 89066991 in words is "eighty-nine million, sixty-six thousand, nine hundred ninety-one".