826993 has 4 divisors (see below), whose sum is σ = 855540. Its totient is φ = 798448.

The previous prime is 826979. The next prime is 826997. The reversal of 826993 is 399628.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 589824 + 237169 = 768^2 + 487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-826993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (826997) 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, 14230 + ... + 14287.

It is an arithmetic number, because the mean of its divisors is an integer number (213885).

2⁸²⁶⁹⁹³ is an apocalyptic number.

It is an amenable number.

826993 is a deficient number, since it is larger than the sum of its proper divisors (28547).

826993 is a wasteful number, since it uses less digits than its factorization.

826993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28546.

The product of its digits is 23328, while the sum is 37.

The square root of 826993 is about 909.3915548321. The cubic root of 826993 is about 93.8643357608.

The spelling of 826993 in words is "eight hundred twenty-six thousand, nine hundred ninety-three".