998300621 has 2 divisors, whose sum is σ = 998300622. Its totient is φ = 998300620.

The previous prime is 998300593. The next prime is 998300627. The reversal of 998300621 is 126003899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847624996 + 150675625 = 29114^2 + 12275^2 .

It is a cyclic number.

It is not a de Polignac number, because 998300621 - 2¹⁰ = 998299597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998300627) 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, 499150310 + 499150311.

It is an arithmetic number, because the mean of its divisors is an integer number (499150311).

Almost surely, 2^998300621 is an apocalyptic number.

It is an amenable number.

998300621 is a deficient number, since it is larger than the sum of its proper divisors (1).

998300621 is an equidigital number, since it uses as much as digits as its factorization.

998300621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 998300621 is about 31595.8956353511. The cubic root of 998300621 is about 999.4332191535.

The spelling of 998300621 in words is "nine hundred ninety-eight million, three hundred thousand, six hundred twenty-one".