31108123843 has 2 divisors, whose sum is σ = 31108123844. Its totient is φ = 31108123842.

The previous prime is 31108123841. The next prime is 31108123909. The reversal of 31108123843 is 34832180113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31108123843 - 2¹ = 31108123841 is a prime.

Together with 31108123841, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31108123799 and 31108123808.

It is not a weakly prime, because it can be changed into another prime (31108123841) 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 as a sum of consecutive naturals, namely, 15554061921 + 15554061922.

It is an arithmetic number, because the mean of its divisors is an integer number (15554061922).

Almost surely, 2^31108123843 is an apocalyptic number.

31108123843 is a deficient number, since it is larger than the sum of its proper divisors (1).

31108123843 is an equidigital number, since it uses as much as digits as its factorization.

31108123843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 31108123843 in words is "thirty-one billion, one hundred eight million, one hundred twenty-three thousand, eight hundred forty-three".