868088993 has 8 divisors (see below), whose sum is σ = 871078440. Its totient is φ = 865105920.

The previous prime is 868088981. The next prime is 868089073. The reversal of 868088993 is 399880868.

It can be written as a sum of positive squares in 4 ways, for example, as 582884449 + 285204544 = 24143^2 + 16888^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868088993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (868088293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484343 + ... + 486131.

It is an arithmetic number, because the mean of its divisors is an integer number (108884805).

Almost surely, 2^868088993 is an apocalyptic number.

It is an amenable number.

868088993 is a deficient number, since it is larger than the sum of its proper divisors (2989447).

868088993 is a wasteful number, since it uses less digits than its factorization.

868088993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187.

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 868088993 is about 29463.3499962241. The cubic root of 868088993 is about 953.9407837259.

The spelling of 868088993 in words is "eight hundred sixty-eight million, eighty-eight thousand, nine hundred ninety-three".