91063689 has 4 divisors (see below), whose sum is σ = 121418256. Its totient is φ = 60709124.

The previous prime is 91063681. The next prime is 91063691. The reversal of 91063689 is 98636019.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91063689 - 2³ = 91063681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91063689.

It is not an unprimeable number, because it can be changed into a prime (91063681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15177279 + ... + 15177284.

It is an arithmetic number, because the mean of its divisors is an integer number (30354564).

Almost surely, 2^91063689 is an apocalyptic number.

It is an amenable number.

91063689 is a deficient number, since it is larger than the sum of its proper divisors (30354567).

91063689 is a wasteful number, since it uses less digits than its factorization.

91063689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30354566.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 91063689 is about 9542.7296409361. The cubic root of 91063689 is about 449.8990539002.

The spelling of 91063689 in words is "ninety-one million, sixty-three thousand, six hundred eighty-nine".