798557 has 4 divisors (see below), whose sum is σ = 818076. Its totient is φ = 779040.

The previous prime is 798533. The next prime is 798569. The reversal of 798557 is 755897.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755897 = 43 ⋅17579.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 534361 = 514^2 + 731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-798557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 19477 = 798557 / (7 + 9 + 8 + 5 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (798517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9698 + ... + 9779.

It is an arithmetic number, because the mean of its divisors is an integer number (204519).

2⁷⁹⁸⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

798557 is a deficient number, since it is larger than the sum of its proper divisors (19519).

798557 is a wasteful number, since it uses less digits than its factorization.

798557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19518.

The product of its digits is 88200, while the sum is 41.

The square root of 798557 is about 893.6201653947. The cubic root of 798557 is about 92.7759279740.

The spelling of 798557 in words is "seven hundred ninety-eight thousand, five hundred fifty-seven".