388391136317 has 2 divisors, whose sum is σ = 388391136318. Its totient is φ = 388391136316.

The previous prime is 388391136313. The next prime is 388391136401. The reversal of 388391136317 is 713631193883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321964321561 + 66426814756 = 567419^2 + 257734^2 .

It is a cyclic number.

It is not a de Polignac number, because 388391136317 - 2² = 388391136313 is a prime.

It is a super-4 number, since 4×388391136317⁴ (a number of 47 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388391136311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194195568158 + 194195568159.

It is an arithmetic number, because the mean of its divisors is an integer number (194195568159).

Almost surely, 2^388391136317 is an apocalyptic number.

It is an amenable number.

388391136317 is a deficient number, since it is larger than the sum of its proper divisors (1).

388391136317 is an equidigital number, since it uses as much as digits as its factorization.

388391136317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The spelling of 388391136317 in words is "three hundred eighty-eight billion, three hundred ninety-one million, one hundred thirty-six thousand, three hundred seventeen".