388717989913 has 32 divisors (see below), whose sum is σ = 432939640320. Its totient is φ = 346027368960.

The previous prime is 388717989889. The next prime is 388717989983. The reversal of 388717989913 is 319989717883.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388717989913 is a prime.

It is a super-2 number, since 2×388717989913² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388717989983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238916206 + ... + 238917832.

It is an arithmetic number, because the mean of its divisors is an integer number (13529363760).

Almost surely, 2^388717989913 is an apocalyptic number.

It is an amenable number.

388717989913 is a deficient number, since it is larger than the sum of its proper divisors (44221650407).

388717989913 is a wasteful number, since it uses less digits than its factorization.

388717989913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917.

The product of its digits is 164602368, while the sum is 73.

It can be divided in two parts, 388717 and 989913, that added together give a triangular number (1378630 = T₁₆₆₀).

The spelling of 388717989913 in words is "three hundred eighty-eight billion, seven hundred seventeen million, nine hundred eighty-nine thousand, nine hundred thirteen".