993739339889823 has 16 divisors (see below), whose sum is σ = 1397898923590400. Its totient is φ = 626195176876800.

The previous prime is 993739339889743. The next prime is 993739339889941. The reversal of 993739339889823 is 328988933937399.

It is not a de Polignac number, because 993739339889823 - 2²¹ = 993739337792671 is a prime.

It is a super-2 number, since 2×993739339889823² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993739339881823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19856493778 + ... + 19856543823.

It is an arithmetic number, because the mean of its divisors is an integer number (87368682724400).

Almost surely, 2^{993739339889823} is an apocalyptic number.

993739339889823 is a deficient number, since it is larger than the sum of its proper divisors (404159583700577).

993739339889823 is a wasteful number, since it uses less digits than its factorization.

993739339889823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39713038062.

The product of its digits is 102852965376, while the sum is 93.

The spelling of 993739339889823 in words is "nine hundred ninety-three trillion, seven hundred thirty-nine billion, three hundred thirty-nine million, eight hundred eighty-nine thousand, eight hundred twenty-three".