89391233 has 2 divisors, whose sum is σ = 89391234. Its totient is φ = 89391232.

The previous prime is 89391221. The next prime is 89391283. The reversal of 89391233 is 33219398.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88209664 + 1181569 = 9392^2 + 1087^2 .

It is a cyclic number.

It is not a de Polignac number, because 89391233 - 2⁴ = 89391217 is a prime.

It is not a weakly prime, because it can be changed into another prime (89391283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44695616 + 44695617.

It is an arithmetic number, because the mean of its divisors is an integer number (44695617).

Almost surely, 2^89391233 is an apocalyptic number.

It is an amenable number.

89391233 is a deficient number, since it is larger than the sum of its proper divisors (1).

89391233 is an equidigital number, since it uses as much as digits as its factorization.

89391233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The square root of 89391233 is about 9454.6937020720. The cubic root of 89391233 is about 447.1277688630.

The spelling of 89391233 in words is "eighty-nine million, three hundred ninety-one thousand, two hundred thirty-three".