388663673 has 6 divisors (see below), whose sum is σ = 412871406. Its totient is φ = 365800832.

The previous prime is 388663661. The next prime is 388663679. The reversal of 388663673 is 376366883.

It can be written as a sum of positive squares in 3 ways, for example, as 179774464 + 208889209 = 13408^2 + 14453^2 .

It is not a de Polignac number, because 388663673 - 2¹⁰ = 388662649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388663679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672140 + ... + 672717.

It is an arithmetic number, because the mean of its divisors is an integer number (68811901).

Almost surely, 2^388663673 is an apocalyptic number.

It is an amenable number.

388663673 is a deficient number, since it is larger than the sum of its proper divisors (24207733).

388663673 is a wasteful number, since it uses less digits than its factorization.

388663673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344891 (or 1344874 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 50.

The square root of 388663673 is about 19714.5548516826. The cubic root of 388663673 is about 729.7789241106.

The spelling of 388663673 in words is "three hundred eighty-eight million, six hundred sixty-three thousand, six hundred seventy-three".