91330 has 8 divisors (see below), whose sum is σ = 164412. Its totient is φ = 36528.
The previous prime is 91309. The next prime is 91331. The reversal of 91330 is 3319.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 90601 + 729 = 301^2 + 27^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is not an unprimeable number, because it can be changed into a prime (91331) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4557 + ... + 4576.
291330 is an apocalyptic number.
91330 is a deficient number, since it is larger than the sum of its proper divisors (73082).
91330 is a wasteful number, since it uses less digits than its factorization.
91330 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9140.
The product of its (nonzero) digits is 81, while the sum is 16.
The square root of 91330 is about 302.2085372719. The cubic root of 91330 is about 45.0337195828.
Adding to 91330 its reverse (3319), we get a palindrome (94649).
The spelling of 91330 in words is "ninety-one thousand, three hundred thirty".
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