993281168879 has 4 divisors (see below), whose sum is σ = 993283490376. Its totient is φ = 993278847384.

The previous prime is 993281168863. The next prime is 993281168897. The reversal of 993281168879 is 978861182399.

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

It is a cyclic number.

It is not a de Polignac number, because 993281168879 - 2⁴ = 993281168863 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 (993281165879) 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, 312164 + ... + 1443609.

It is an arithmetic number, because the mean of its divisors is an integer number (248320872594).

Almost surely, 2^993281168879 is an apocalyptic number.

993281168879 is a deficient number, since it is larger than the sum of its proper divisors (2321497).

993281168879 is a wasteful number, since it uses less digits than its factorization.

993281168879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321496.

The product of its digits is 94058496, while the sum is 71.

The spelling of 993281168879 in words is "nine hundred ninety-three billion, two hundred eighty-one million, one hundred sixty-eight thousand, eight hundred seventy-nine".