388476421 has 2 divisors, whose sum is σ = 388476422. Its totient is φ = 388476420.

The previous prime is 388476377. The next prime is 388476443. The reversal of 388476421 is 124674883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209960100 + 178516321 = 14490^2 + 13361^2 .

It is a cyclic number.

It is not a de Polignac number, because 388476421 - 2⁷ = 388476293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388476461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194238210 + 194238211.

It is an arithmetic number, because the mean of its divisors is an integer number (194238211).

Almost surely, 2^388476421 is an apocalyptic number.

It is an amenable number.

388476421 is a deficient number, since it is larger than the sum of its proper divisors (1).

388476421 is an equidigital number, since it uses as much as digits as its factorization.

388476421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 388476421 is about 19709.8051994432. The cubic root of 388476421 is about 729.6617066428.

The spelling of 388476421 in words is "three hundred eighty-eight million, four hundred seventy-six thousand, four hundred twenty-one".