89381 has 2 divisors, whose sum is σ = 89382. Its totient is φ = 89380.

The previous prime is 89371. The next prime is 89387. The reversal of 89381 is 18398.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52900 + 36481 = 230^2 + 191^2 .

It is a cyclic number.

It is not a de Polignac number, because 89381 - 2⁶ = 89317 is a prime.

It is a super-2 number, since 2×89381² = 15977926322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44690 + 44691.

It is an arithmetic number, because the mean of its divisors is an integer number (44691).

2⁸⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

89381 is a deficient number, since it is larger than the sum of its proper divisors (1).

89381 is an equidigital number, since it uses as much as digits as its factorization.

89381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 89381 is about 298.9665533132. The cubic root of 89381 is about 44.7110706664.

The spelling of 89381 in words is "eighty-nine thousand, three hundred eighty-one".