993838871 has 4 divisors (see below), whose sum is σ = 1046146200. Its totient is φ = 941531544.

The previous prime is 993838861. The next prime is 993838897. The reversal of 993838871 is 178838399.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993838871 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 (993838831) 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, 26153636 + ... + 26153673.

It is an arithmetic number, because the mean of its divisors is an integer number (261536550).

Almost surely, 2^993838871 is an apocalyptic number.

993838871 is a deficient number, since it is larger than the sum of its proper divisors (52307329).

993838871 is a wasteful number, since it uses less digits than its factorization.

993838871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52307328.

The product of its digits is 2612736, while the sum is 56.

The square root of 993838871 is about 31525.2100865323. The cubic root of 993838871 is about 997.9420581137.

The spelling of 993838871 in words is "nine hundred ninety-three million, eight hundred thirty-eight thousand, eight hundred seventy-one".