998945401 has 2 divisors, whose sum is σ = 998945402. Its totient is φ = 998945400.

The previous prime is 998945393. The next prime is 998945459. The reversal of 998945401 is 104549899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699655401 + 299290000 = 26451^2 + 17300^2 .

It is a cyclic number.

It is not a de Polignac number, because 998945401 - 2³ = 998945393 is a prime.

It is not a weakly prime, because it can be changed into another prime (998945491) 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, 499472700 + 499472701.

It is an arithmetic number, because the mean of its divisors is an integer number (499472701).

Almost surely, 2^998945401 is an apocalyptic number.

It is an amenable number.

998945401 is a deficient number, since it is larger than the sum of its proper divisors (1).

998945401 is an equidigital number, since it uses as much as digits as its factorization.

998945401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 998945401 is about 31606.0975287997. The cubic root of 998945401 is about 999.6483433521.

The spelling of 998945401 in words is "nine hundred ninety-eight million, nine hundred forty-five thousand, four hundred one".