388021223 has 2 divisors, whose sum is σ = 388021224. Its totient is φ = 388021222.

The previous prime is 388021217. The next prime is 388021273. The reversal of 388021223 is 322120883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 388021223 - 2²⁰ = 386972647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194010611 + 194010612.

It is an arithmetic number, because the mean of its divisors is an integer number (194010612).

Almost surely, 2^388021223 is an apocalyptic number.

388021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

388021223 is an equidigital number, since it uses as much as digits as its factorization.

388021223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 388021223 is about 19698.2543135172. The cubic root of 388021223 is about 729.3766010827.

The spelling of 388021223 in words is "three hundred eighty-eight million, twenty-one thousand, two hundred twenty-three".