388172423 has 2 divisors, whose sum is σ = 388172424. Its totient is φ = 388172422.

The previous prime is 388172401. The next prime is 388172479. The reversal of 388172423 is 324271883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 388172423 - 2¹⁸ = 387910279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388172023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194086211 + 194086212.

It is an arithmetic number, because the mean of its divisors is an integer number (194086212).

Almost surely, 2^388172423 is an apocalyptic number.

388172423 is a deficient number, since it is larger than the sum of its proper divisors (1).

388172423 is an equidigital number, since it uses as much as digits as its factorization.

388172423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 388172423 is about 19702.0918432536. The cubic root of 388172423 is about 729.4713273624.

The spelling of 388172423 in words is "three hundred eighty-eight million, one hundred seventy-two thousand, four hundred twenty-three".