97843234878 has 64 divisors (see below), whose sum is σ = 221729195520. Its totient is φ = 31974803136.

The previous prime is 97843234843. The next prime is 97843234897. The reversal of 97843234878 is 87843234879.

97843234878 is a `hidden beast` number, since 97 + 8 + 43 + 23 + 487 + 8 = 666.

It is a super-2 number, since 2×97843234878² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 584001 + ... + 732627.

It is an arithmetic number, because the mean of its divisors is an integer number (3464518680).

Almost surely, 2^97843234878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97843234878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110864597760).

97843234878 is an abundant number, since it is smaller than the sum of its proper divisors (123885960642).

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

97843234878 is a wasteful number, since it uses less digits than its factorization.

97843234878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148878 (or 148872 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 63.

Subtracting from 97843234878 its reverse (87843234879), we obtain a palindrome (9999999999).

The spelling of 97843234878 in words is "ninety-seven billion, eight hundred forty-three million, two hundred thirty-four thousand, eight hundred seventy-eight".