399843452823 has 16 divisors (see below), whose sum is σ = 544480030080. Its totient is φ = 260908597664.

The previous prime is 399843452783. The next prime is 399843452831. The reversal of 399843452823 is 328254348993.

It is a cyclic number.

It is not a de Polignac number, because 399843452823 - 2¹⁶ = 399843387287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399843452863) 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, 2934261 + ... + 3067502.

It is an arithmetic number, because the mean of its divisors is an integer number (34030001880).

Almost surely, 2^399843452823 is an apocalyptic number.

399843452823 is a deficient number, since it is larger than the sum of its proper divisors (144636577257).

399843452823 is a wasteful number, since it uses less digits than its factorization.

399843452823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002238.

The product of its digits is 44789760, while the sum is 60.

The spelling of 399843452823 in words is "three hundred ninety-nine billion, eight hundred forty-three million, four hundred fifty-two thousand, eight hundred twenty-three".