393246729 has 6 divisors (see below), whose sum is σ = 568023066. Its totient is φ = 262164480.

The previous prime is 393246691. The next prime is 393246731. The reversal of 393246729 is 927642393.

It can be written as a sum of positive squares in only one way, i.e., 344176704 + 49070025 = 18552^2 + 7005^2 .

It is not a de Polignac number, because 393246729 - 2¹¹ = 393244681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (393246829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21847032 + ... + 21847049.

It is an arithmetic number, because the mean of its divisors is an integer number (94670511).

Almost surely, 2^393246729 is an apocalyptic number.

It is an amenable number.

393246729 is a deficient number, since it is larger than the sum of its proper divisors (174776337).

393246729 is a wasteful number, since it uses less digits than its factorization.

393246729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43694087 (or 43694084 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 393246729 is about 19830.4495410467. The cubic root of 393246729 is about 732.6361988972.

The spelling of 393246729 in words is "three hundred ninety-three million, two hundred forty-six thousand, seven hundred twenty-nine".