97855 has 4 divisors (see below), whose sum is σ = 117432. Its totient is φ = 78280.

The previous prime is 97849. The next prime is 97859. The reversal of 97855 is 55879.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 97855 - 2³ = 97847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9781 + ... + 9790.

It is an arithmetic number, because the mean of its divisors is an integer number (29358).

2⁹⁷⁸⁵⁵ is an apocalyptic number.

97855 is a deficient number, since it is larger than the sum of its proper divisors (19577).

97855 is a wasteful number, since it uses less digits than its factorization.

97855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19576.

The product of its digits is 12600, while the sum is 34.

The square root of 97855 is about 312.8178383660. The cubic root of 97855 is about 46.0816131504.

The spelling of 97855 in words is "ninety-seven thousand, eight hundred fifty-five".