998860349 has 2 divisors, whose sum is σ = 998860350. Its totient is φ = 998860348.

The previous prime is 998860259. The next prime is 998860351. The reversal of 998860349 is 943068899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875094724 + 123765625 = 29582^2 + 11125^2 .

It is a cyclic number.

It is not a de Polignac number, because 998860349 - 2¹⁶ = 998794813 is a prime.

Together with 998860351, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 998860294 and 998860303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998860549) 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, 499430174 + 499430175.

It is an arithmetic number, because the mean of its divisors is an integer number (499430175).

Almost surely, 2^998860349 is an apocalyptic number.

It is an amenable number.

998860349 is a deficient number, since it is larger than the sum of its proper divisors (1).

998860349 is an equidigital number, since it uses as much as digits as its factorization.

998860349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 998860349 is about 31604.7520002926. The cubic root of 998860349 is about 999.6199719303.

The spelling of 998860349 in words is "nine hundred ninety-eight million, eight hundred sixty thousand, three hundred forty-nine".