388399553 has 2 divisors, whose sum is σ = 388399554. Its totient is φ = 388399552.

The previous prime is 388399549. The next prime is 388399559. The reversal of 388399553 is 355993883.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362826304 + 25573249 = 19048^2 + 5057^2 .

It is a cyclic number.

It is not a de Polignac number, because 388399553 - 2² = 388399549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388399495 and 388399504.

It is not a weakly prime, because it can be changed into another prime (388399559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194199776 + 194199777.

It is an arithmetic number, because the mean of its divisors is an integer number (194199777).

Almost surely, 2^388399553 is an apocalyptic number.

It is an amenable number.

388399553 is a deficient number, since it is larger than the sum of its proper divisors (1).

388399553 is an equidigital number, since it uses as much as digits as its factorization.

388399553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 53.

The square root of 388399553 is about 19707.8551090676. The cubic root of 388399553 is about 729.6135773075.

The spelling of 388399553 in words is "three hundred eighty-eight million, three hundred ninety-nine thousand, five hundred fifty-three".