868993 has 2 divisors, whose sum is σ = 868994. Its totient is φ = 868992.

The previous prime is 868957. The next prime is 868997. The reversal of 868993 is 399868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 831744 + 37249 = 912^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 868993 - 2¹⁷ = 737921 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434496 + 434497.

It is an arithmetic number, because the mean of its divisors is an integer number (434497).

2⁸⁶⁸⁹⁹³ is an apocalyptic number.

It is an amenable number.

868993 is a deficient number, since it is larger than the sum of its proper divisors (1).

868993 is an equidigital number, since it uses as much as digits as its factorization.

868993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 868993 is about 932.1979403539. The cubic root of 868993 is about 95.4271805843.

The spelling of 868993 in words is "eight hundred sixty-eight thousand, nine hundred ninety-three".