97517239613 has 4 divisors (see below), whose sum is σ = 97529423580. Its totient is φ = 97505055648.

The previous prime is 97517239607. The next prime is 97517239639. The reversal of 97517239613 is 31693271579.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31693271579 = 5227 ⋅6063377.

It can be written as a sum of positive squares in 2 ways, for example, as 34135149049 + 63382090564 = 184757^2 + 251758^2 .

It is a cyclic number.

It is not a de Polignac number, because 97517239613 - 2³⁴ = 80337370429 is a prime.

It is a super-4 number, since 4×97517239613⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97517239513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6079970 + ... + 6095987.

It is an arithmetic number, because the mean of its divisors is an integer number (24382355895).

Almost surely, 2^97517239613 is an apocalyptic number.

It is an amenable number.

97517239613 is a deficient number, since it is larger than the sum of its proper divisors (12183967).

97517239613 is a wasteful number, since it uses less digits than its factorization.

97517239613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12183966.

The product of its digits is 2143260, while the sum is 53.

The spelling of 97517239613 in words is "ninety-seven billion, five hundred seventeen million, two hundred thirty-nine thousand, six hundred thirteen".