9977447 has 2 divisors, whose sum is σ = 9977448. Its totient is φ = 9977446.

The previous prime is 9977437. The next prime is 9977449. The reversal of 9977447 is 7447799.

It is a strong prime.

It is an emirp because it is prime and its reverse (7447799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9977447 is a prime.

Together with 9977449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9977449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988723 + 4988724.

It is an arithmetic number, because the mean of its divisors is an integer number (4988724).

Almost surely, 2^9977447 is an apocalyptic number.

9977447 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977447 is an equidigital number, since it uses as much as digits as its factorization.

9977447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 47.

The square root of 9977447 is about 3158.7097049270. The cubic root of 9977447 is about 215.2813838733.

The spelling of 9977447 in words is "nine million, nine hundred seventy-seven thousand, four hundred forty-seven".