97811 has 8 divisors (see below), whose sum is σ = 113760. Its totient is φ = 82368.

The previous prime is 97789. The next prime is 97813. The reversal of 97811 is 11879.

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 97811 - 2¹⁰ = 96787 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 97811.

It is not an unprimeable number, because it can be changed into a prime (97813) 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, 545 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (14220).

2⁹⁷⁸¹¹ is an apocalyptic number.

97811 is a deficient number, since it is larger than the sum of its proper divisors (15949).

97811 is a wasteful number, since it uses less digits than its factorization.

97811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its digits is 504, while the sum is 26.

The square root of 97811 is about 312.7475019884. The cubic root of 97811 is about 46.0747053278.

It can be divided in two parts, 978 and 11, that added together give a palindrome (989).

The spelling of 97811 in words is "ninety-seven thousand, eight hundred eleven".