399066723 has 32 divisors (see below), whose sum is σ = 646444800. Its totient is φ = 241300800.

The previous prime is 399066713. The next prime is 399066727. The reversal of 399066723 is 327660993.

It is not a de Polignac number, because 399066723 - 2¹⁰ = 399065699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399066727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153448 + ... + 156026.

It is an arithmetic number, because the mean of its divisors is an integer number (20201400).

Almost surely, 2^399066723 is an apocalyptic number.

399066723 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

399066723 is a deficient number, since it is larger than the sum of its proper divisors (247378077).

399066723 is a wasteful number, since it uses less digits than its factorization.

399066723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120 (or 3114 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 399066723 is about 19976.6544496320. The cubic root of 399066723 is about 736.2328165035.

The spelling of 399066723 in words is "three hundred ninety-nine million, sixty-six thousand, seven hundred twenty-three".