193863209401 has 9 divisors (see below), whose sum is σ = 198725411503. Its totient is φ = 189117226480.

The previous prime is 193863209341. The next prime is 193863209429. The reversal of 193863209401 is 104902368391.

It is a happy number.

The square root of 193863209401 is 440299.

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

193863209401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9341415801 + 184521793600 = 96651^2 + 429560^2 .

It is not a de Polignac number, because 193863209401 - 2³¹ = 191715725753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193863209471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18046890 + ... + 18057628.

Almost surely, 2^193863209401 is an apocalyptic number.

193863209401 is the 440299-th square number.

193863209401 is the 220150-th centered octagonal number.

It is an amenable number.

193863209401 is a deficient number, since it is larger than the sum of its proper divisors (4862202102).

193863209401 is an frugal number, since it uses more digits than its factorization.

193863209401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21560 (or 10780 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 193863209401 in words is "one hundred ninety-three billion, eight hundred sixty-three million, two hundred nine thousand, four hundred one".