97878 has 16 divisors (see below), whose sum is σ = 213696. Its totient is φ = 29640.

The previous prime is 97871. The next prime is 97879. The reversal of 97878 is 87879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97871) by changing a digit.

97878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 676 + ... + 807.

It is an arithmetic number, because the mean of its divisors is an integer number (13356).

2⁹⁷⁸⁷⁸ is an apocalyptic number.

97878 is an abundant number, since it is smaller than the sum of its proper divisors (115818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106848).

97878 is a wasteful number, since it uses less digits than its factorization.

97878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499.

The product of its digits is 28224, while the sum is 39.

The square root of 97878 is about 312.8545988155. The cubic root of 97878 is about 46.0852232336.

Subtracting from 97878 its reverse (87879), we obtain a palindrome (9999).

It can be divided in two parts, 9 and 7878, that added together give a palindrome (7887).

The spelling of 97878 in words is "ninety-seven thousand, eight hundred seventy-eight".