10000009997 has 2 divisors, whose sum is σ = 10000009998. Its totient is φ = 10000009996.

The previous prime is 10000009993. The next prime is 10000010071. The reversal of 10000009997 is 79990000001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421457956 + 3578552041 = 80134^2 + 59821^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000009997 - 2² = 10000009993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10000009993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000004998 + 5000004999.

It is an arithmetic number, because the mean of its divisors is an integer number (5000004999).

Almost surely, 2^10000009997 is an apocalyptic number.

It is an amenable number.

10000009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000009997 is an equidigital number, since it uses as much as digits as its factorization.

10000009997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 35.

Adding to 10000009997 its reverse (79990000001), we get a palindrome (89990009998).

The spelling of 10000009997 in words is "ten billion, nine thousand, nine hundred ninety-seven".