998370647 has 2 divisors, whose sum is σ = 998370648. Its totient is φ = 998370646.

The previous prime is 998370631. The next prime is 998370691. The reversal of 998370647 is 746073899.

It is a weak prime.

It is an emirp because it is prime and its reverse (746073899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998370647 - 2⁴ = 998370631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998370047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499185323 + 499185324.

It is an arithmetic number, because the mean of its divisors is an integer number (499185324).

Almost surely, 2^998370647 is an apocalyptic number.

998370647 is a deficient number, since it is larger than the sum of its proper divisors (1).

998370647 is an equidigital number, since it uses as much as digits as its factorization.

998370647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 998370647 is about 31597.0037661801. The cubic root of 998370647 is about 999.4565870892.

The spelling of 998370647 in words is "nine hundred ninety-eight million, three hundred seventy thousand, six hundred forty-seven".