91226089 has 4 divisors (see below), whose sum is σ = 91264324. Its totient is φ = 91187856.

The previous prime is 91226081. The next prime is 91226101. The reversal of 91226089 is 98062219.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51724864 + 39501225 = 7192^2 + 6285^2 .

It is a cyclic number.

It is not a de Polignac number, because 91226089 - 2³ = 91226081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91226081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15282 + ... + 20395.

It is an arithmetic number, because the mean of its divisors is an integer number (22816081).

Almost surely, 2^91226089 is an apocalyptic number.

It is an amenable number.

91226089 is a deficient number, since it is larger than the sum of its proper divisors (38235).

91226089 is a wasteful number, since it uses less digits than its factorization.

91226089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38234.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 91226089 is about 9551.2349463302. The cubic root of 91226089 is about 450.1663401517.

The spelling of 91226089 in words is "ninety-one million, two hundred twenty-six thousand, eighty-nine".