91237 has 2 divisors, whose sum is σ = 91238. Its totient is φ = 91236.

The previous prime is 91229. The next prime is 91243. The reversal of 91237 is 73219.

91237 is nontrivially palindromic in base 4.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54756 + 36481 = 234^2 + 191^2 .

It is a cyclic number.

It is not a de Polignac number, because 91237 - 2³ = 91229 is a prime.

91237 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91237.

It is not a weakly prime, because it can be changed into another prime (91297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45618 + 45619.

It is an arithmetic number, because the mean of its divisors is an integer number (45619).

2⁹¹²³⁷ is an apocalyptic number.

It is an amenable number.

91237 is a deficient number, since it is larger than the sum of its proper divisors (1).

91237 is an equidigital number, since it uses as much as digits as its factorization.

91237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 22.

The square root of 91237 is about 302.0546308203. The cubic root of 91237 is about 45.0184286659.

It can be divided in two parts, 912 and 37, that added together give a palindrome (949).

The spelling of 91237 in words is "ninety-one thousand, two hundred thirty-seven".