388473649 has 2 divisors, whose sum is σ = 388473650. Its totient is φ = 388473648.

The previous prime is 388473643. The next prime is 388473691. The reversal of 388473649 is 946374883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388287025 + 186624 = 19705^2 + 432^2 .

It is a cyclic number.

It is not a de Polignac number, because 388473649 - 2¹⁹ = 387949361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388473596 and 388473605.

It is not a weakly prime, because it can be changed into another prime (388473643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194236824 + 194236825.

It is an arithmetic number, because the mean of its divisors is an integer number (194236825).

Almost surely, 2^388473649 is an apocalyptic number.

It is an amenable number.

388473649 is a deficient number, since it is larger than the sum of its proper divisors (1).

388473649 is an equidigital number, since it uses as much as digits as its factorization.

388473649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 52.

The square root of 388473649 is about 19709.7348789881. The cubic root of 388473649 is about 729.6599711217.

The spelling of 388473649 in words is "three hundred eighty-eight million, four hundred seventy-three thousand, six hundred forty-nine".