91122023 has 4 divisors (see below), whose sum is σ = 96482160. Its totient is φ = 85761888.

The previous prime is 91122011. The next prime is 91122029. The reversal of 91122023 is 32022119.

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

It is a cyclic number.

It is not a de Polignac number, because 91122023 - 2¹⁶ = 91056487 is a prime.

It is a super-2 number, since 2×91122023² = 16606446151225058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91121986 and 91122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91122029) 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, 2680043 + ... + 2680076.

It is an arithmetic number, because the mean of its divisors is an integer number (24120540).

Almost surely, 2^91122023 is an apocalyptic number.

91122023 is a deficient number, since it is larger than the sum of its proper divisors (5360137).

91122023 is a wasteful number, since it uses less digits than its factorization.

91122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360136.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 91122023 is about 9545.7856146050. The cubic root of 91122023 is about 449.9950995351.

The spelling of 91122023 in words is "ninety-one million, one hundred twenty-two thousand, twenty-three".