9797079581 has 2 divisors, whose sum is σ = 9797079582. Its totient is φ = 9797079580.

The previous prime is 9797079569. The next prime is 9797079613. The reversal of 9797079581 is 1859707979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8670403225 + 1126676356 = 93115^2 + 33566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9797079581 is a prime.

It is a super-2 number, since 2×9797079581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9797079181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4898539790 + 4898539791.

It is an arithmetic number, because the mean of its divisors is an integer number (4898539791).

Almost surely, 2^9797079581 is an apocalyptic number.

It is an amenable number.

9797079581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9797079581 is an equidigital number, since it uses as much as digits as its factorization.

9797079581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10001880, while the sum is 62.

The square root of 9797079581 is about 98980.1979236251. The cubic root of 9797079581 is about 2139.7623677819.

The spelling of 9797079581 in words is "nine billion, seven hundred ninety-seven million, seventy-nine thousand, five hundred eighty-one".