103919450539921 has 9 divisors (see below), whose sum is σ = 109676965237833. Its totient is φ = 98449822281060.

The previous prime is 103919450539903. The next prime is 103919450539967. The reversal of 103919450539921 is 129935054919301.

The square root of 103919450539921 is 10194089.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 103919450539921 - 2¹⁵ = 103919450507153 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 103919450539921.

It is not an unprimeable number, because it can be changed into a prime (103919150539921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 193419426 + ... + 193955956.

Almost surely, 2^{103919450539921} is an apocalyptic number.

103919450539921 is the 10194089-th square number.

103919450539921 is the 5097045-th centered octagonal number.

It is an amenable number.

103919450539921 is a deficient number, since it is larger than the sum of its proper divisors (5757514697912).

103919450539921 is an frugal number, since it uses more digits than its factorization.

103919450539921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073100 (or 536550 counting only the distinct ones).

The product of its (nonzero) digits is 11809800, while the sum is 61.

The spelling of 103919450539921 in words is "one hundred three trillion, nine hundred nineteen billion, four hundred fifty million, five hundred thirty-nine thousand, nine hundred twenty-one".