388085987 has 2 divisors, whose sum is σ = 388085988. Its totient is φ = 388085986.

The previous prime is 388085977. The next prime is 388086053. The reversal of 388085987 is 789580883.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 388085987 - 2²⁶ = 320977123 is a prime.

It is a super-2 number, since 2×388085987² = 301221466611528338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (388085947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194042993 + 194042994.

It is an arithmetic number, because the mean of its divisors is an integer number (194042994).

Almost surely, 2^388085987 is an apocalyptic number.

388085987 is a deficient number, since it is larger than the sum of its proper divisors (1).

388085987 is an equidigital number, since it uses as much as digits as its factorization.

388085987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The square root of 388085987 is about 19699.8981469448. The cubic root of 388085987 is about 729.4171785181.

The spelling of 388085987 in words is "three hundred eighty-eight million, eighty-five thousand, nine hundred eighty-seven".