91224269 has 2 divisors, whose sum is σ = 91224270. Its totient is φ = 91224268.

The previous prime is 91224257. The next prime is 91224271. The reversal of 91224269 is 96242219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69722500 + 21501769 = 8350^2 + 4637^2 .

It is a cyclic number.

It is not a de Polignac number, because 91224269 - 2⁴ = 91224253 is a prime.

It is a super-2 number, since 2×91224269² = 16643734509168722, which contains 22 as substring.

Together with 91224271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91224229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45612134 + 45612135.

It is an arithmetic number, because the mean of its divisors is an integer number (45612135).

Almost surely, 2^91224269 is an apocalyptic number.

It is an amenable number.

91224269 is a deficient number, since it is larger than the sum of its proper divisors (1).

91224269 is an equidigital number, since it uses as much as digits as its factorization.

91224269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 91224269 is about 9551.1396702174. The cubic root of 91224269 is about 450.1633464607.

The spelling of 91224269 in words is "ninety-one million, two hundred twenty-four thousand, two hundred sixty-nine".