388458397 has 2 divisors, whose sum is σ = 388458398. Its totient is φ = 388458396.

The previous prime is 388458391. The next prime is 388458409. The reversal of 388458397 is 793854883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204747481 + 183710916 = 14309^2 + 13554^2 .

It is a cyclic number.

It is not a de Polignac number, because 388458397 - 2⁷ = 388458269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388458391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194229198 + 194229199.

It is an arithmetic number, because the mean of its divisors is an integer number (194229199).

Almost surely, 2^388458397 is an apocalyptic number.

It is an amenable number.

388458397 is a deficient number, since it is larger than the sum of its proper divisors (1).

388458397 is an equidigital number, since it uses as much as digits as its factorization.

388458397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The square root of 388458397 is about 19709.3479597880. The cubic root of 388458397 is about 729.6504218515.

The spelling of 388458397 in words is "three hundred eighty-eight million, four hundred fifty-eight thousand, three hundred ninety-seven".