9709798447 has 2 divisors, whose sum is σ = 9709798448. Its totient is φ = 9709798446.

The previous prime is 9709798367. The next prime is 9709798559. The reversal of 9709798447 is 7448979079.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9709798447 - 2¹¹ = 9709796399 is a prime.

It is a super-2 number, since 2×9709798447² (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 (9709793447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4854899223 + 4854899224.

It is an arithmetic number, because the mean of its divisors is an integer number (4854899224).

Almost surely, 2^9709798447 is an apocalyptic number.

9709798447 is a deficient number, since it is larger than the sum of its proper divisors (1).

9709798447 is an equidigital number, since it uses as much as digits as its factorization.

9709798447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32006016, while the sum is 64.

The square root of 9709798447 is about 98538.3095399957. The cubic root of 9709798447 is about 2133.3890992069.

The spelling of 9709798447 in words is "nine billion, seven hundred nine million, seven hundred ninety-eight thousand, four hundred forty-seven".