388289343217 has 4 divisors (see below), whose sum is σ = 411129892836. Its totient is φ = 365448793600.

The previous prime is 388289343193. The next prime is 388289343229. The reversal of 388289343217 is 712343982883.

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

It can be written as a sum of positive squares in 2 ways, for example, as 289778732721 + 98510610496 = 538311^2 + 313864^2 .

It is a cyclic number.

It is not a de Polignac number, because 388289343217 - 2²³ = 388280954609 is a prime.

It is a super-2 number, since 2×388289343217² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388289343287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11420274784 + ... + 11420274817.

It is an arithmetic number, because the mean of its divisors is an integer number (102782473209).

Almost surely, 2^388289343217 is an apocalyptic number.

It is an amenable number.

388289343217 is a deficient number, since it is larger than the sum of its proper divisors (22840549619).

388289343217 is a wasteful number, since it uses less digits than its factorization.

388289343217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22840549618.

The product of its digits is 13934592, while the sum is 58.

The spelling of 388289343217 in words is "three hundred eighty-eight billion, two hundred eighty-nine million, three hundred forty-three thousand, two hundred seventeen".