998743 has 2 divisors, whose sum is σ = 998744. Its totient is φ = 998742.

The previous prime is 998737. The next prime is 998749. The reversal of 998743 is 347899.

It is a balanced prime because it is at equal distance from previous prime (998737) and next prime (998749).

It is an emirp because it is prime and its reverse (347899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998743 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 998696 and 998705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499371 + 499372.

It is an arithmetic number, because the mean of its divisors is an integer number (499372).

2⁹⁹⁸⁷⁴³ is an apocalyptic number.

998743 is a deficient number, since it is larger than the sum of its proper divisors (1).

998743 is an equidigital number, since it uses as much as digits as its factorization.

998743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 998743 is about 999.3713023696. The cubic root of 998743 is about 99.9580824316.

The spelling of 998743 in words is "nine hundred ninety-eight thousand, seven hundred forty-three".