388042973 has 2 divisors, whose sum is σ = 388042974. Its totient is φ = 388042972.

The previous prime is 388042957. The next prime is 388042999. The reversal of 388042973 is 379240883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348830329 + 39212644 = 18677^2 + 6262^2 .

It is a cyclic number.

It is not a de Polignac number, because 388042973 - 2⁴ = 388042957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388042673) 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, 194021486 + 194021487.

It is an arithmetic number, because the mean of its divisors is an integer number (194021487).

Almost surely, 2^388042973 is an apocalyptic number.

It is an amenable number.

388042973 is a deficient number, since it is larger than the sum of its proper divisors (1).

388042973 is an equidigital number, since it uses as much as digits as its factorization.

388042973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 388042973 is about 19698.8063851595. The cubic root of 388042973 is about 729.3902288980.

The spelling of 388042973 in words is "three hundred eighty-eight million, forty-two thousand, nine hundred seventy-three".