989107397 has 2 divisors, whose sum is σ = 989107398. Its totient is φ = 989107396.

The previous prime is 989107393. The next prime is 989107423. The reversal of 989107397 is 793701989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 960442081 + 28665316 = 30991^2 + 5354^2 .

It is an emirp because it is prime and its reverse (793701989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989107397 - 2² = 989107393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989107391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494553698 + 494553699.

It is an arithmetic number, because the mean of its divisors is an integer number (494553699).

Almost surely, 2^989107397 is an apocalyptic number.

It is an amenable number.

989107397 is a deficient number, since it is larger than the sum of its proper divisors (1).

989107397 is an equidigital number, since it uses as much as digits as its factorization.

989107397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 989107397 is about 31450.0778536397. The cubic root of 989107397 is about 996.3558687719.

The spelling of 989107397 in words is "nine hundred eighty-nine million, one hundred seven thousand, three hundred ninety-seven".