798689 has 4 divisors (see below), whose sum is σ = 826260. Its totient is φ = 771120.

The previous prime is 798667. The next prime is 798691. The reversal of 798689 is 986897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986897 = 191 ⋅5167.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 429025 = 608^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 798689 - 2¹² = 794593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (798649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13742 + ... + 13799.

It is an arithmetic number, because the mean of its divisors is an integer number (206565).

2⁷⁹⁸⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

798689 is a deficient number, since it is larger than the sum of its proper divisors (27571).

798689 is a wasteful number, since it uses less digits than its factorization.

798689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27570.

The product of its digits is 217728, while the sum is 47.

The square root of 798689 is about 893.6940192258. The cubic root of 798689 is about 92.7810395890.

The spelling of 798689 in words is "seven hundred ninety-eight thousand, six hundred eighty-nine".