9791561713 has 2 divisors, whose sum is σ = 9791561714. Its totient is φ = 9791561712.

The previous prime is 9791561693. The next prime is 9791561737. The reversal of 9791561713 is 3171651979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6078853089 + 3712708624 = 77967^2 + 60932^2 .

It is a cyclic number.

It is not a de Polignac number, because 9791561713 - 2¹⁷ = 9791430641 is a prime.

It is not a weakly prime, because it can be changed into another prime (9791561743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895780856 + 4895780857.

It is an arithmetic number, because the mean of its divisors is an integer number (4895780857).

Almost surely, 2^9791561713 is an apocalyptic number.

It is an amenable number.

9791561713 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791561713 is an equidigital number, since it uses as much as digits as its factorization.

9791561713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 49.

The square root of 9791561713 is about 98952.3204023028. The cubic root of 9791561713 is about 2139.3605764961.

The spelling of 9791561713 in words is "nine billion, seven hundred ninety-one million, five hundred sixty-one thousand, seven hundred thirteen".