89391 has 8 divisors (see below), whose sum is σ = 120960. Its totient is φ = 58712.

The previous prime is 89387. The next prime is 89393. The reversal of 89391 is 19398.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 89391 - 2² = 89387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70 + ... + 428.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

2⁸⁹³⁹¹ is an apocalyptic number.

89391 is a deficient number, since it is larger than the sum of its proper divisors (31569).

89391 is a wasteful number, since it uses less digits than its factorization.

89391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its digits is 1944, while the sum is 30.

The square root of 89391 is about 298.9832771243. The cubic root of 89391 is about 44.7127380380.

The spelling of 89391 in words is "eighty-nine thousand, three hundred ninety-one".