388438133 has 2 divisors, whose sum is σ = 388438134. Its totient is φ = 388438132.

The previous prime is 388438103. The next prime is 388438163. The reversal of 388438133 is 331834883.

It is a balanced prime because it is at equal distance from previous prime (388438103) and next prime (388438163).

It can be written as a sum of positive squares in only one way, i.e., 360316324 + 28121809 = 18982^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 388438133 - 2⁶ = 388438069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388438103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194219066 + 194219067.

It is an arithmetic number, because the mean of its divisors is an integer number (194219067).

Almost surely, 2^388438133 is an apocalyptic number.

It is an amenable number.

388438133 is a deficient number, since it is larger than the sum of its proper divisors (1).

388438133 is an equidigital number, since it uses as much as digits as its factorization.

388438133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 41.

The square root of 388438133 is about 19708.8338822976. The cubic root of 388438133 is about 729.6377341837.

The spelling of 388438133 in words is "three hundred eighty-eight million, four hundred thirty-eight thousand, one hundred thirty-three".