388379987 has 2 divisors, whose sum is σ = 388379988. Its totient is φ = 388379986.

The previous prime is 388379963. The next prime is 388379989. The reversal of 388379987 is 789973883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388379987 - 2⁶ = 388379923 is a prime.

Together with 388379989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (388379989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194189993 + 194189994.

It is an arithmetic number, because the mean of its divisors is an integer number (194189994).

Almost surely, 2^388379987 is an apocalyptic number.

388379987 is a deficient number, since it is larger than the sum of its proper divisors (1).

388379987 is an equidigital number, since it uses as much as digits as its factorization.

388379987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 62.

The square root of 388379987 is about 19707.3587017642. The cubic root of 388379987 is about 729.6013254405.

The spelling of 388379987 in words is "three hundred eighty-eight million, three hundred seventy-nine thousand, nine hundred eighty-seven".