388816487 has 2 divisors, whose sum is σ = 388816488. Its totient is φ = 388816486.

The previous prime is 388816481. The next prime is 388816507. The reversal of 388816487 is 784618883.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 388816487 - 2⁴ = 388816471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388816481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194408243 + 194408244.

It is an arithmetic number, because the mean of its divisors is an integer number (194408244).

Almost surely, 2^388816487 is an apocalyptic number.

388816487 is a deficient number, since it is larger than the sum of its proper divisors (1).

388816487 is an equidigital number, since it uses as much as digits as its factorization.

388816487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2064384, while the sum is 53.

The square root of 388816487 is about 19718.4301352821. The cubic root of 388816487 is about 729.8745559140.

The spelling of 388816487 in words is "three hundred eighty-eight million, eight hundred sixteen thousand, four hundred eighty-seven".