98781 has 8 divisors (see below), whose sum is σ = 138720. Its totient is φ = 62352.

The previous prime is 98779. The next prime is 98801. The reversal of 98781 is 18789.

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

It is not a de Polignac number, because 98781 - 2¹ = 98779 is a prime.

It is a super-2 number, since 2×98781² = 19515371922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 98781.

It is not an unprimeable number, because it can be changed into a prime (98711) 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, 810 + ... + 923.

It is an arithmetic number, because the mean of its divisors is an integer number (17340).

2⁹⁸⁷⁸¹ is an apocalyptic number.

It is an amenable number.

98781 is a deficient number, since it is larger than the sum of its proper divisors (39939).

98781 is a wasteful number, since it uses less digits than its factorization.

98781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755.

The product of its digits is 4032, while the sum is 33.

The square root of 98781 is about 314.2944479306. The cubic root of 98781 is about 46.2265135196.

Subtracting from 98781 its product of digits (4032), we obtain a palindrome (94749).

The spelling of 98781 in words is "ninety-eight thousand, seven hundred eighty-one".