91222689 has 8 divisors (see below), whose sum is σ = 121876000. Its totient is φ = 60692256.

The previous prime is 91222679. The next prime is 91222709. The reversal of 91222689 is 98622219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91222689 - 2⁹ = 91222177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91222609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28972 + ... + 31965.

It is an arithmetic number, because the mean of its divisors is an integer number (15234500).

Almost surely, 2^91222689 is an apocalyptic number.

It is an amenable number.

91222689 is a deficient number, since it is larger than the sum of its proper divisors (30653311).

91222689 is a wasteful number, since it uses less digits than its factorization.

91222689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61439.

The product of its digits is 31104, while the sum is 39.

The square root of 91222689 is about 9551.0569572168. The cubic root of 91222689 is about 450.1607475097.

It can be divided in two parts, 9122 and 2689, that added together give a palindrome (11811).

The spelling of 91222689 in words is "ninety-one million, two hundred twenty-two thousand, six hundred eighty-nine".