97831534081 has 4 divisors (see below), whose sum is σ = 98397034452. Its totient is φ = 97266033712.

The previous prime is 97831534079. The next prime is 97831534111. The reversal of 97831534081 is 18043513879.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66162128400 + 31669405681 = 257220^2 + 177959^2 .

It is a cyclic number.

It is not a de Polignac number, because 97831534081 - 2¹ = 97831534079 is a prime.

It is a super-2 number, since 2×97831534081² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97831534001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282749926 + ... + 282750271.

It is an arithmetic number, because the mean of its divisors is an integer number (24599258613).

Almost surely, 2^97831534081 is an apocalyptic number.

It is an amenable number.

97831534081 is a deficient number, since it is larger than the sum of its proper divisors (565500371).

97831534081 is a wasteful number, since it uses less digits than its factorization.

97831534081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565500370.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 97831534081 in words is "ninety-seven billion, eight hundred thirty-one million, five hundred thirty-four thousand, eighty-one".