993878194841 has 4 divisors (see below), whose sum is σ = 1135860794112. Its totient is φ = 851895595572.

The previous prime is 993878194831. The next prime is 993878194843. The reversal of 993878194841 is 148491878399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 993878194841 - 2³⁸ = 719000287897 is a prime.

It is a super-4 number, since 4×993878194841⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993878194843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70991299625 + ... + 70991299638.

It is an arithmetic number, because the mean of its divisors is an integer number (283965198528).

Almost surely, 2^993878194841 is an apocalyptic number.

It is an amenable number.

993878194841 is a deficient number, since it is larger than the sum of its proper divisors (141982599271).

993878194841 is a wasteful number, since it uses less digits than its factorization.

993878194841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141982599270.

The product of its digits is 125411328, while the sum is 71.

The spelling of 993878194841 in words is "nine hundred ninety-three billion, eight hundred seventy-eight million, one hundred ninety-four thousand, eight hundred forty-one".