31828938139 has 4 divisors (see below), whose sum is σ = 32926487760. Its totient is φ = 30731388520.

The previous prime is 31828938067. The next prime is 31828938157. The reversal of 31828938139 is 93183982813.

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 31828938139 - 2⁹ = 31828937627 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 31828938139.

It is not an unprimeable number, because it can be changed into a prime (31828938199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548774767 + ... + 548774824.

It is an arithmetic number, because the mean of its divisors is an integer number (8231621940).

Almost surely, 2^31828938139 is an apocalyptic number.

31828938139 is a deficient number, since it is larger than the sum of its proper divisors (1097549621).

31828938139 is a wasteful number, since it uses less digits than its factorization.

31828938139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097549620.

The product of its digits is 2239488, while the sum is 55.

The spelling of 31828938139 in words is "thirty-one billion, eight hundred twenty-eight million, nine hundred thirty-eight thousand, one hundred thirty-nine".