91769 has 4 divisors (see below), whose sum is σ = 92496. Its totient is φ = 91044.

The previous prime is 91757. The next prime is 91771. The reversal of 91769 is 96719.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 91769 - 2⁴ = 91753 is a prime.

It is a super-2 number, since 2×91769² = 16843098722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91769.

It is not an unprimeable number, because it can be changed into a prime (91369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119 + ... + 444.

It is an arithmetic number, because the mean of its divisors is an integer number (23124).

2⁹¹⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

91769 is a deficient number, since it is larger than the sum of its proper divisors (727).

91769 is a wasteful number, since it uses less digits than its factorization.

91769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 3402, while the sum is 32.

The square root of 91769 is about 302.9339862082. The cubic root of 91769 is about 45.1057594787.

Subtracting 91769 from its reverse (96719), we obtain a triangular number (4950 = T₉₉).

The spelling of 91769 in words is "ninety-one thousand, seven hundred sixty-nine".