1781123807103 has 4 divisors (see below), whose sum is σ = 2374831742808. Its totient is φ = 1187415871400.

The previous prime is 1781123807087. The next prime is 1781123807119. The reversal of 1781123807103 is 3017083211871.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1781123807087) and next prime (1781123807119).

It is a cyclic number.

It is not a de Polignac number, because 1781123807103 - 2⁴ = 1781123807087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1781123807153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296853967848 + ... + 296853967853.

It is an arithmetic number, because the mean of its divisors is an integer number (593707935702).

Almost surely, 2^{1781123807103} is an apocalyptic number.

1781123807103 is a deficient number, since it is larger than the sum of its proper divisors (593707935705).

1781123807103 is an equidigital number, since it uses as much as digits as its factorization.

1781123807103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593707935704.

The product of its (nonzero) digits is 56448, while the sum is 42.

The spelling of 1781123807103 in words is "one trillion, seven hundred eighty-one billion, one hundred twenty-three million, eight hundred seven thousand, one hundred three".