9997553669 has 2 divisors, whose sum is σ = 9997553670. Its totient is φ = 9997553668.

The previous prime is 9997553653. The next prime is 9997553711. The reversal of 9997553669 is 9663557999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6293248900 + 3704304769 = 79330^2 + 60863^2 .

It is a cyclic number.

It is not a de Polignac number, because 9997553669 - 2⁴ = 9997553653 is a prime.

It is a super-2 number, since 2×9997553669² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9997553599 and 9997553608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9997553609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998776834 + 4998776835.

It is an arithmetic number, because the mean of its divisors is an integer number (4998776835).

Almost surely, 2^9997553669 is an apocalyptic number.

It is an amenable number.

9997553669 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997553669 is an equidigital number, since it uses as much as digits as its factorization.

9997553669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124002900, while the sum is 68.

The square root of 9997553669 is about 99987.7675968416. The cubic root of 9997553669 is about 2154.2589936917.

The spelling of 9997553669 in words is "nine billion, nine hundred ninety-seven million, five hundred fifty-three thousand, six hundred sixty-nine".