998590597 has 2 divisors, whose sum is σ = 998590598. Its totient is φ = 998590596.

The previous prime is 998590589. The next prime is 998590603. The reversal of 998590597 is 795095899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 933852481 + 64738116 = 30559^2 + 8046^2 .

It is a cyclic number.

It is not a de Polignac number, because 998590597 - 2³ = 998590589 is a prime.

It is a super-3 number, since 3×998590597³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998590577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499295298 + 499295299.

It is an arithmetic number, because the mean of its divisors is an integer number (499295299).

Almost surely, 2^998590597 is an apocalyptic number.

It is an amenable number.

998590597 is a deficient number, since it is larger than the sum of its proper divisors (1).

998590597 is an equidigital number, since it uses as much as digits as its factorization.

998590597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9185400, while the sum is 61.

The square root of 998590597 is about 31600.4841260383. The cubic root of 998590597 is about 999.5299781140.

The spelling of 998590597 in words is "nine hundred ninety-eight million, five hundred ninety thousand, five hundred ninety-seven".