209763143473 has 4 divisors (see below), whose sum is σ = 225898769908. Its totient is φ = 193627517040.

The previous prime is 209763143467. The next prime is 209763143501. The reversal of 209763143473 is 374341367902.

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

It can be written as a sum of positive squares in 2 ways, for example, as 125551166224 + 84211977249 = 354332^2 + 290193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209763143473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209763143773) 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, 8067813198 + ... + 8067813223.

It is an arithmetic number, because the mean of its divisors is an integer number (56474692477).

Almost surely, 2^209763143473 is an apocalyptic number.

It is an amenable number.

209763143473 is a deficient number, since it is larger than the sum of its proper divisors (16135626435).

209763143473 is a wasteful number, since it uses less digits than its factorization.

209763143473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16135626434.

The product of its (nonzero) digits is 2286144, while the sum is 49.

The spelling of 209763143473 in words is "two hundred nine billion, seven hundred sixty-three million, one hundred forty-three thousand, four hundred seventy-three".