96781 has 4 divisors (see below), whose sum is σ = 102492. Its totient is φ = 91072.

The previous prime is 96779. The next prime is 96787. The reversal of 96781 is 18769.

96781 = 16² + 17² + ... + 66².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18769 = 137².

It can be written as a sum of positive squares in 2 ways, for example, as 42025 + 54756 = 205^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 96781 - 2¹ = 96779 is a prime.

It is a super-2 number, since 2×96781² = 18733123922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (96787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2830 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (25623).

2⁹⁶⁷⁸¹ is an apocalyptic number.

It is an amenable number.

96781 is a deficient number, since it is larger than the sum of its proper divisors (5711).

96781 is a wasteful number, since it uses less digits than its factorization.

96781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710.

The product of its digits is 3024, while the sum is 31.

The square root of 96781 is about 311.0964480672. The cubic root of 96781 is about 45.9124041894.

The spelling of 96781 in words is "ninety-six thousand, seven hundred eighty-one".