103785185109 has 4 divisors (see below), whose sum is σ = 138380246816. Its totient is φ = 69190123404.

The previous prime is 103785185039. The next prime is 103785185129. The reversal of 103785185109 is 901581587301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 103785185109 - 2¹² = 103785181013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103785185129) 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, 17297530849 + ... + 17297530854.

It is an arithmetic number, because the mean of its divisors is an integer number (34595061704).

Almost surely, 2^103785185109 is an apocalyptic number.

It is an amenable number.

103785185109 is a deficient number, since it is larger than the sum of its proper divisors (34595061707).

103785185109 is an equidigital number, since it uses as much as digits as its factorization.

103785185109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34595061706.

The product of its (nonzero) digits is 302400, while the sum is 48.

The spelling of 103785185109 in words is "one hundred three billion, seven hundred eighty-five million, one hundred eighty-five thousand, one hundred nine".