388389473 has 2 divisors, whose sum is σ = 388389474. Its totient is φ = 388389472.

The previous prime is 388389409. The next prime is 388389479. The reversal of 388389473 is 374983883.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366645904 + 21743569 = 19148^2 + 4663^2 .

It is a cyclic number.

It is not a de Polignac number, because 388389473 - 2⁶ = 388389409 is a prime.

It is not a weakly prime, because it can be changed into another prime (388389479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194194736 + 194194737.

It is an arithmetic number, because the mean of its divisors is an integer number (194194737).

Almost surely, 2^388389473 is an apocalyptic number.

It is an amenable number.

388389473 is a deficient number, since it is larger than the sum of its proper divisors (1).

388389473 is an equidigital number, since it uses as much as digits as its factorization.

388389473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 53.

The square root of 388389473 is about 19707.5993718159. The cubic root of 388389473 is about 729.6072654495.

The spelling of 388389473 in words is "three hundred eighty-eight million, three hundred eighty-nine thousand, four hundred seventy-three".