998970263 has 2 divisors, whose sum is σ = 998970264. Its totient is φ = 998970262.

The previous prime is 998970251. The next prime is 998970299. The reversal of 998970263 is 362079899.

It is a weak prime.

It is an emirp because it is prime and its reverse (362079899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998970263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998970223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499485131 + 499485132.

It is an arithmetic number, because the mean of its divisors is an integer number (499485132).

Almost surely, 2^998970263 is an apocalyptic number.

998970263 is a deficient number, since it is larger than the sum of its proper divisors (1).

998970263 is an equidigital number, since it uses as much as digits as its factorization.

998970263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 998970263 is about 31606.4908365355. The cubic root of 998970263 is about 999.6566364483.

The spelling of 998970263 in words is "nine hundred ninety-eight million, nine hundred seventy thousand, two hundred sixty-three".