97997682321 has 36 divisors (see below), whose sum is σ = 177817663296. Its totient is φ = 50907882960.

The previous prime is 97997682311. The next prime is 97997682347. The reversal of 97997682321 is 12328679979.

It is not a de Polignac number, because 97997682321 - 2¹³ = 97997674129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (97997682301) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6420141 + ... + 6435386.

It is an arithmetic number, because the mean of its divisors is an integer number (4939379536).

Almost surely, 2^97997682321 is an apocalyptic number.

It is an amenable number.

97997682321 is a deficient number, since it is larger than the sum of its proper divisors (79819980975).

97997682321 is a wasteful number, since it uses less digits than its factorization.

97997682321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12855562 (or 12855548 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

It can be divided in two parts, 9799768 and 2321, that added together give a palindrome (9802089).

The spelling of 97997682321 in words is "ninety-seven billion, nine hundred ninety-seven million, six hundred eighty-two thousand, three hundred twenty-one".