388912397 has 2 divisors, whose sum is σ = 388912398. Its totient is φ = 388912396.

The previous prime is 388912379. The next prime is 388912411. The reversal of 388912397 is 793219883.

It is a happy number.

Together with previous prime (388912379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213773641 + 175138756 = 14621^2 + 13234^2 .

It is a cyclic number.

It is not a de Polignac number, because 388912397 - 2⁸ = 388912141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388912367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194456198 + 194456199.

It is an arithmetic number, because the mean of its divisors is an integer number (194456199).

Almost surely, 2^388912397 is an apocalyptic number.

It is an amenable number.

388912397 is a deficient number, since it is larger than the sum of its proper divisors (1).

388912397 is an equidigital number, since it uses as much as digits as its factorization.

388912397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 388912397 is about 19720.8619740619. The cubic root of 388912397 is about 729.9345640977.

The spelling of 388912397 in words is "three hundred eighty-eight million, nine hundred twelve thousand, three hundred ninety-seven".