998406593 has 2 divisors, whose sum is σ = 998406594. Its totient is φ = 998406592.

The previous prime is 998406587. The next prime is 998406599. The reversal of 998406593 is 395604899.

998406593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (998406587) and next prime (998406599).

It can be written as a sum of positive squares in only one way, i.e., 607474609 + 390931984 = 24647^2 + 19772^2 .

It is a cyclic number.

It is not a de Polignac number, because 998406593 - 2¹⁴ = 998390209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (998406599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499203296 + 499203297.

It is an arithmetic number, because the mean of its divisors is an integer number (499203297).

Almost surely, 2^998406593 is an apocalyptic number.

It is an amenable number.

998406593 is a deficient number, since it is larger than the sum of its proper divisors (1).

998406593 is an equidigital number, since it uses as much as digits as its factorization.

998406593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 998406593 is about 31597.5725808170. The cubic root of 998406593 is about 999.4685819782.

The spelling of 998406593 in words is "nine hundred ninety-eight million, four hundred six thousand, five hundred ninety-three".