998740213 has 2 divisors, whose sum is σ = 998740214. Its totient is φ = 998740212.

The previous prime is 998740189. The next prime is 998740261. The reversal of 998740213 is 312047899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997106929 + 1633284 = 31577^2 + 1278^2 .

It is a cyclic number.

It is not a de Polignac number, because 998740213 - 2⁵ = 998740181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998740213.

It is a congruent number.

It is a weakly prime.

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, 499370106 + 499370107.

It is an arithmetic number, because the mean of its divisors is an integer number (499370107).

Almost surely, 2^998740213 is an apocalyptic number.

It is an amenable number.

998740213 is a deficient number, since it is larger than the sum of its proper divisors (1).

998740213 is an equidigital number, since it uses as much as digits as its factorization.

998740213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 998740213 is about 31602.8513428773. The cubic root of 998740213 is about 999.5798945361.

The spelling of 998740213 in words is "nine hundred ninety-eight million, seven hundred forty thousand, two hundred thirteen".