91880233 has 2 divisors, whose sum is σ = 91880234. Its totient is φ = 91880232.

The previous prime is 91880203. The next prime is 91880263. The reversal of 91880233 is 33208819.

It is a balanced prime because it is at equal distance from previous prime (91880203) and next prime (91880263).

It can be written as a sum of positive squares in only one way, i.e., 91623184 + 257049 = 9572^2 + 507^2 .

It is a cyclic number.

It is not a de Polignac number, because 91880233 - 2⁹ = 91879721 is a prime.

It is a super-2 number, since 2×91880233² = 16883954432268578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91880203) 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 as a sum of consecutive naturals, namely, 45940116 + 45940117.

It is an arithmetic number, because the mean of its divisors is an integer number (45940117).

Almost surely, 2^91880233 is an apocalyptic number.

It is an amenable number.

91880233 is a deficient number, since it is larger than the sum of its proper divisors (1).

91880233 is an equidigital number, since it uses as much as digits as its factorization.

91880233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 91880233 is about 9585.4177269434. The cubic root of 91880233 is about 451.2397631725.

The spelling of 91880233 in words is "ninety-one million, eight hundred eighty thousand, two hundred thirty-three".