91369 has 2 divisors, whose sum is σ = 91370. Its totient is φ = 91368.

The previous prime is 91367. The next prime is 91373. The reversal of 91369 is 96319.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90000 + 1369 = 300^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 91369 - 2¹ = 91367 is a prime.

It is a super-2 number, since 2×91369² = 16696588322, which contains 22 as substring.

Together with 91367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45684 + 45685.

It is an arithmetic number, because the mean of its divisors is an integer number (45685).

2⁹¹³⁶⁹ is an apocalyptic number.

It is an amenable number.

91369 is a deficient number, since it is larger than the sum of its proper divisors (1).

91369 is an equidigital number, since it uses as much as digits as its factorization.

91369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 28.

The square root of 91369 is about 302.2730553655. The cubic root of 91369 is about 45.0401288135.

Subtracting 91369 from its reverse (96319), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 9 and 1369, that multiplied together give a palindrome (12321).

The spelling of 91369 in words is "ninety-one thousand, three hundred sixty-nine".