388669381487 has 4 divisors (see below), whose sum is σ = 388736249400. Its totient is φ = 388602513576.

The previous prime is 388669381483. The next prime is 388669381489. The reversal of 388669381487 is 784183966883.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 388669381487 - 2² = 388669381483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388669381487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388669381483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33425237 + ... + 33436862.

It is an arithmetic number, because the mean of its divisors is an integer number (97184062350).

Almost surely, 2^388669381487 is an apocalyptic number.

388669381487 is a deficient number, since it is larger than the sum of its proper divisors (66867913).

388669381487 is an equidigital number, since it uses as much as digits as its factorization.

388669381487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66867912.

The product of its digits is 334430208, while the sum is 71.

The spelling of 388669381487 in words is "three hundred eighty-eight billion, six hundred sixty-nine million, three hundred eighty-one thousand, four hundred eighty-seven".