9665629447 has 2 divisors, whose sum is σ = 9665629448. Its totient is φ = 9665629446.

The previous prime is 9665629417. The next prime is 9665629453. The reversal of 9665629447 is 7449265669.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9665629447 - 2²⁷ = 9531411719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9665629391 and 9665629400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9665629417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832814723 + 4832814724.

It is an arithmetic number, because the mean of its divisors is an integer number (4832814724).

Almost surely, 2^9665629447 is an apocalyptic number.

9665629447 is a deficient number, since it is larger than the sum of its proper divisors (1).

9665629447 is an equidigital number, since it uses as much as digits as its factorization.

9665629447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 58.

The square root of 9665629447 is about 98313.9331275074. The cubic root of 9665629447 is about 2130.1493166794.

The spelling of 9665629447 in words is "nine billion, six hundred sixty-five million, six hundred twenty-nine thousand, four hundred forty-seven".