9977389 has 2 divisors, whose sum is σ = 9977390. Its totient is φ = 9977388.

The previous prime is 9977371. The next prime is 9977399. The reversal of 9977389 is 9837799.

9977389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6461764 + 3515625 = 2542^2 + 1875^2 .

It is an emirp because it is prime and its reverse (9837799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9977389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9977329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988694 + 4988695.

It is an arithmetic number, because the mean of its divisors is an integer number (4988695).

Almost surely, 2^9977389 is an apocalyptic number.

It is an amenable number.

9977389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977389 is an equidigital number, since it uses as much as digits as its factorization.

9977389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 52.

The square root of 9977389 is about 3158.7005239497. The cubic root of 9977389 is about 215.2809667210.

The spelling of 9977389 in words is "nine million, nine hundred seventy-seven thousand, three hundred eighty-nine".