93881 has 4 divisors (see below), whose sum is σ = 94500. Its totient is φ = 93264.
The previous prime is 93871. The next prime is 93887. The reversal of 93881 is 18839.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 33856 + 60025 = 184^2 + 245^2 .
It is a cyclic number.
It is not a de Polignac number, because 93881 - 210 = 92857 is a prime.
It is a super-2 number, since 2×938812 = 17627284322, which contains 22 as substring.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (93887) 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 3 ways as a sum of consecutive naturals, for example, 95 + ... + 443.
It is an arithmetic number, because the mean of its divisors is an integer number (23625).
293881 is an apocalyptic number.
It is an amenable number.
93881 is a deficient number, since it is larger than the sum of its proper divisors (619).
93881 is a wasteful number, since it uses less digits than its factorization.
93881 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 618.
The product of its digits is 1728, while the sum is 29.
The square root of 93881 is about 306.4000652741. The cubic root of 93881 is about 45.4491643327.
The spelling of 93881 in words is "ninety-three thousand, eight hundred eighty-one".
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