91225829 has 2 divisors, whose sum is σ = 91225830. Its totient is φ = 91225828.

The previous prime is 91225819. The next prime is 91225847. The reversal of 91225829 is 92852219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 21836929 = 8330^2 + 4673^2 .

It is a cyclic number.

It is not a de Polignac number, because 91225829 - 2⁸ = 91225573 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91225792 and 91225801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91225819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45612914 + 45612915.

It is an arithmetic number, because the mean of its divisors is an integer number (45612915).

Almost surely, 2^91225829 is an apocalyptic number.

It is an amenable number.

91225829 is a deficient number, since it is larger than the sum of its proper divisors (1).

91225829 is an equidigital number, since it uses as much as digits as its factorization.

91225829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 91225829 is about 9551.2213355152. The cubic root of 91225829 is about 450.1659124840.

The spelling of 91225829 in words is "ninety-one million, two hundred twenty-five thousand, eight hundred twenty-nine".