823199809743 has 24 divisors (see below), whose sum is σ = 1214565071616. Its totient is φ = 537035086800.

The previous prime is 823199809717. The next prime is 823199809777. The reversal of 823199809743 is 347908991328.

823199809743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 823199809743 - 2⁵ = 823199809711 is a prime.

It is a super-2 number, since 2×823199809743² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823199809843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2470588 + ... + 2783918.

It is an arithmetic number, because the mean of its divisors is an integer number (50606877984).

Almost surely, 2^823199809743 is an apocalyptic number.

823199809743 is a deficient number, since it is larger than the sum of its proper divisors (391365261873).

823199809743 is a wasteful number, since it uses less digits than its factorization.

823199809743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319595 (or 319592 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 823199809743 in words is "eight hundred twenty-three billion, one hundred ninety-nine million, eight hundred nine thousand, seven hundred forty-three".