38931171679 has 4 divisors (see below), whose sum is σ = 39188994160. Its totient is φ = 38673349200.

The previous prime is 38931171637. The next prime is 38931171731. The reversal of 38931171679 is 97617113983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97617113983 = 205307 ⋅475469.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38931171679 is a prime.

It is a super-2 number, since 2×38931171679² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38931171179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128911014 + ... + 128911315.

It is an arithmetic number, because the mean of its divisors is an integer number (9797248540).

Almost surely, 2^38931171679 is an apocalyptic number.

38931171679 is a deficient number, since it is larger than the sum of its proper divisors (257822481).

38931171679 is a wasteful number, since it uses less digits than its factorization.

38931171679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257822480.

The product of its digits is 1714608, while the sum is 55.

The spelling of 38931171679 in words is "thirty-eight billion, nine hundred thirty-one million, one hundred seventy-one thousand, six hundred seventy-nine".