9997616477 has 2 divisors, whose sum is σ = 9997616478. Its totient is φ = 9997616476.

The previous prime is 9997616459. The next prime is 9997616483. The reversal of 9997616477 is 7746167999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9080374681 + 917241796 = 95291^2 + 30286^2 .

It is a cyclic number.

It is not a de Polignac number, because 9997616477 - 2⁸ = 9997616221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9997616677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998808238 + 4998808239.

It is an arithmetic number, because the mean of its divisors is an integer number (4998808239).

Almost surely, 2^9997616477 is an apocalyptic number.

It is an amenable number.

9997616477 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997616477 is an equidigital number, since it uses as much as digits as its factorization.

9997616477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36006768, while the sum is 65.

The square root of 9997616477 is about 99988.0816747676. The cubic root of 9997616477 is about 2154.2635049425.

The spelling of 9997616477 in words is "nine billion, nine hundred ninety-seven million, six hundred sixteen thousand, four hundred seventy-seven".