998622943 has 2 divisors, whose sum is σ = 998622944. Its totient is φ = 998622942.

The previous prime is 998622941. The next prime is 998622953. The reversal of 998622943 is 349226899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998622943 - 2¹ = 998622941 is a prime.

Together with 998622941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998622941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499311471 + 499311472.

It is an arithmetic number, because the mean of its divisors is an integer number (499311472).

Almost surely, 2^998622943 is an apocalyptic number.

998622943 is a deficient number, since it is larger than the sum of its proper divisors (1).

998622943 is an equidigital number, since it uses as much as digits as its factorization.

998622943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 52.

The square root of 998622943 is about 31600.9959178504. The cubic root of 998622943 is about 999.5407701402.

The spelling of 998622943 in words is "nine hundred ninety-eight million, six hundred twenty-two thousand, nine hundred forty-three".