91854233 has 2 divisors, whose sum is σ = 91854234. Its totient is φ = 91854232.

The previous prime is 91854229. The next prime is 91854241. The reversal of 91854233 is 33245819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90878089 + 976144 = 9533^2 + 988^2 .

It is an emirp because it is prime and its reverse (33245819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91854233 - 2² = 91854229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91854193 and 91854202.

It is not a weakly prime, because it can be changed into another prime (91854283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45927116 + 45927117.

It is an arithmetic number, because the mean of its divisors is an integer number (45927117).

Almost surely, 2^91854233 is an apocalyptic number.

It is an amenable number.

91854233 is a deficient number, since it is larger than the sum of its proper divisors (1).

91854233 is an equidigital number, since it uses as much as digits as its factorization.

91854233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 91854233 is about 9584.0614042273. The cubic root of 91854233 is about 451.1971956536.

The spelling of 91854233 in words is "ninety-one million, eight hundred fifty-four thousand, two hundred thirty-three".