9705212471761 has 3 divisors (see below), whose sum is σ = 9705215587081. Its totient is φ = 9705209356442.

The previous prime is 9705212471687. The next prime is 9705212471791. The reversal of 9705212471761 is 1671742125079.

The square root of 9705212471761 is 3115319.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9705212471761 - 2²¹ = 9705210374609 is a prime.

It is a super-2 number, since 2×9705212471761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9705212471699 and 9705212471708.

It is not an unprimeable number, because it can be changed into a prime (9705212471791) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1557660 + ... + 4672978.

Almost surely, 2^{9705212471761} is an apocalyptic number.

9705212471761 is the 3115319-th square number.

9705212471761 is the 1557660-th centered octagonal number.

It is an amenable number.

9705212471761 is a deficient number, since it is larger than the sum of its proper divisors (3115320).

9705212471761 is an frugal number, since it uses more digits than its factorization.

9705212471761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230638 (or 3115319 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 9705212471761 in words is "nine trillion, seven hundred five billion, two hundred twelve million, four hundred seventy-one thousand, seven hundred sixty-one".