998759 has 2 divisors, whose sum is σ = 998760. Its totient is φ = 998758.

The previous prime is 998749. The next prime is 998779. The reversal of 998759 is 957899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998759 - 2⁴ = 998743 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

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, 499379 + 499380.

It is an arithmetic number, because the mean of its divisors is an integer number (499380).

2⁹⁹⁸⁷⁵⁹ is an apocalyptic number.

998759 is a deficient number, since it is larger than the sum of its proper divisors (1).

998759 is an equidigital number, since it uses as much as digits as its factorization.

998759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 47.

The square root of 998759 is about 999.3793073703. The cubic root of 998759 is about 99.9586162095.

The spelling of 998759 in words is "nine hundred ninety-eight thousand, seven hundred fifty-nine".