103726163721 has 4 divisors (see below), whose sum is σ = 138301551632. Its totient is φ = 69150775812.

The previous prime is 103726163719. The next prime is 103726163767. The reversal of 103726163721 is 127361627301.

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, and also an emirpimes, since its reverse is a distinct semiprime: 127361627301 = 3 ⋅42453875767.

It is not a de Polignac number, because 103726163721 - 2¹ = 103726163719 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 103726163721.

It is not an unprimeable number, because it can be changed into a prime (103726163701) 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, 17287693951 + ... + 17287693956.

It is an arithmetic number, because the mean of its divisors is an integer number (34575387908).

Almost surely, 2^103726163721 is an apocalyptic number.

It is an amenable number.

103726163721 is a deficient number, since it is larger than the sum of its proper divisors (34575387911).

103726163721 is an equidigital number, since it uses as much as digits as its factorization.

103726163721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34575387910.

The product of its (nonzero) digits is 63504, while the sum is 39.

The spelling of 103726163721 in words is "one hundred three billion, seven hundred twenty-six million, one hundred sixty-three thousand, seven hundred twenty-one".