393247913858 has 6 divisors (see below), whose sum is σ = 589873201059. Its totient is φ = 196623513506.

The previous prime is 393247913857. The next prime is 393247913899. The reversal of 393247913858 is 858319742393.

It can be written as a sum of positive squares in only one way, i.e., 196623956929 + 196623956929 = 443423^2 + 443423^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=443423.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 393247913858.

It is not an unprimeable number, because it can be changed into a prime (393247913857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 665135 + ... + 1108557.

Almost surely, 2^393247913858 is an apocalyptic number.

393247913858 is a deficient number, since it is larger than the sum of its proper divisors (196625287201).

393247913858 is an frugal number, since it uses more digits than its factorization.

393247913858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886848 (or 443425 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 62.

The spelling of 393247913858 in words is "three hundred ninety-three billion, two hundred forty-seven million, nine hundred thirteen thousand, eight hundred fifty-eight".