388889273 has 2 divisors, whose sum is σ = 388889274. Its totient is φ = 388889272.

The previous prime is 388889269. The next prime is 388889311. The reversal of 388889273 is 372988883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379353529 + 9535744 = 19477^2 + 3088^2 .

It is an emirp because it is prime and its reverse (372988883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 388889273 - 2² = 388889269 is a prime.

It is not a weakly prime, because it can be changed into another prime (388889173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194444636 + 194444637.

It is an arithmetic number, because the mean of its divisors is an integer number (194444637).

Almost surely, 2^388889273 is an apocalyptic number.

It is an amenable number.

388889273 is a deficient number, since it is larger than the sum of its proper divisors (1).

388889273 is an equidigital number, since it uses as much as digits as its factorization.

388889273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 56.

The square root of 388889273 is about 19720.2756826572. The cubic root of 388889273 is about 729.9200969653.

The spelling of 388889273 in words is "three hundred eighty-eight million, eight hundred eighty-nine thousand, two hundred seventy-three".