1381108123 has 2 divisors, whose sum is σ = 1381108124. Its totient is φ = 1381108122.

The previous prime is 1381108121. The next prime is 1381108129. The reversal of 1381108123 is 3218011831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1381108123 - 2¹ = 1381108121 is a prime.

Together with 1381108121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1381108091 and 1381108100.

It is not a weakly prime, because it can be changed into another prime (1381108121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690554061 + 690554062.

It is an arithmetic number, because the mean of its divisors is an integer number (690554062).

Almost surely, 2^1381108123 is an apocalyptic number.

1381108123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381108123 is an equidigital number, since it uses as much as digits as its factorization.

1381108123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1381108123 is about 37163.2630833193. The cubic root of 1381108123 is about 1113.6342002332.

Adding to 1381108123 its reverse (3218011831), we get a palindrome (4599119954).

The spelling of 1381108123 in words is "one billion, three hundred eighty-one million, one hundred eight thousand, one hundred twenty-three".