91299 has 8 divisors (see below), whose sum is σ = 131152. Its totient is φ = 56160.

The previous prime is 91297. The next prime is 91303. The reversal of 91299 is 99219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91299 - 2¹ = 91297 is a prime.

It is a Duffinian number.

91299 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (91291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (16394).

2⁹¹²⁹⁹ is an apocalyptic number.

91299 is a deficient number, since it is larger than the sum of its proper divisors (39853).

91299 is a wasteful number, since it uses less digits than its factorization.

91299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357.

The product of its digits is 1458, while the sum is 30.

The square root of 91299 is about 302.1572438318. The cubic root of 91299 is about 45.0286237643.

Multiplying 91299 by its sum of digits (30), we get a triangular number (2738970 = T₂₃₄₀).

The spelling of 91299 in words is "ninety-one thousand, two hundred ninety-nine".