871386993 has 24 divisors (see below), whose sum is σ = 1323024768. Its totient is φ = 551593152.

The previous prime is 871386991. The next prime is 871387001. The reversal of 871386993 is 399683178.

It is not a de Polignac number, because 871386993 - 2¹ = 871386991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (871386991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12996 + ... + 43722.

It is an arithmetic number, because the mean of its divisors is an integer number (55126032).

Almost surely, 2^871386993 is an apocalyptic number.

It is an amenable number.

871386993 is a deficient number, since it is larger than the sum of its proper divisors (451637775).

871386993 is a wasteful number, since it uses less digits than its factorization.

871386993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30893 (or 30890 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 871386993 is about 29519.2647774297. The cubic root of 871386993 is about 955.1473116871.

The spelling of 871386993 in words is "eight hundred seventy-one million, three hundred eighty-six thousand, nine hundred ninety-three".