91222123 has 4 divisors (see below), whose sum is σ = 91559008. Its totient is φ = 90885240.

The previous prime is 91222111. The next prime is 91222147. The reversal of 91222123 is 32122219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32122219 = 479 ⋅67061.

It is a cyclic number.

It is not a de Polignac number, because 91222123 - 2¹³ = 91213931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91222094 and 91222103.

It is not an unprimeable number, because it can be changed into a prime (91222223) 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 3 ways as a sum of consecutive naturals, for example, 168036 + ... + 168577.

It is an arithmetic number, because the mean of its divisors is an integer number (22889752).

Almost surely, 2^91222123 is an apocalyptic number.

91222123 is a deficient number, since it is larger than the sum of its proper divisors (336885).

91222123 is a wasteful number, since it uses less digits than its factorization.

91222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336884.

The product of its digits is 432, while the sum is 22.

The square root of 91222123 is about 9551.0273269424. The cubic root of 91222123 is about 450.1598164858.

The spelling of 91222123 in words is "ninety-one million, two hundred twenty-two thousand, one hundred twenty-three".