91393 has 2 divisors, whose sum is σ = 91394. Its totient is φ = 91392.

The previous prime is 91387. The next prime is 91397. The reversal of 91393 is 39319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63504 + 27889 = 252^2 + 167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91393 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (91397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45696 + 45697.

It is an arithmetic number, because the mean of its divisors is an integer number (45697).

2⁹¹³⁹³ is an apocalyptic number.

It is an amenable number.

91393 is a deficient number, since it is larger than the sum of its proper divisors (1).

91393 is an equidigital number, since it uses as much as digits as its factorization.

91393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729, while the sum is 25.

The square root of 91393 is about 302.3127519639. The cubic root of 91393 is about 45.0440720490.

It can be divided in two parts, 91 and 393, that added together give a palindrome (484).

The spelling of 91393 in words is "ninety-one thousand, three hundred ninety-three".