9997007729 has 2 divisors, whose sum is σ = 9997007730. Its totient is φ = 9997007728.

The previous prime is 9997007723. The next prime is 9997007749. The reversal of 9997007729 is 9277007999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6556950625 + 3440057104 = 80975^2 + 58652^2 .

It is a cyclic number.

It is not a de Polignac number, because 9997007729 - 2¹² = 9997003633 is a prime.

It is not a weakly prime, because it can be changed into another prime (9997007723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998503864 + 4998503865.

It is an arithmetic number, because the mean of its divisors is an integer number (4998503865).

Almost surely, 2^9997007729 is an apocalyptic number.

It is an amenable number.

9997007729 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997007729 is an equidigital number, since it uses as much as digits as its factorization.

9997007729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500846, while the sum is 59.

The square root of 9997007729 is about 99985.0375256218. The cubic root of 9997007729 is about 2154.2197801800.

The spelling of 9997007729 in words is "nine billion, nine hundred ninety-seven million, seven thousand, seven hundred twenty-nine".