209723126473 has 16 divisors (see below), whose sum is σ = 245343288960. Its totient is φ = 175520814336.

The previous prime is 209723126429. The next prime is 209723126497. The reversal of 209723126473 is 374621327902.

It is a happy number.

209723126473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209723126473 - 2⁹ = 209723125961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209723126773) 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 15 ways as a sum of consecutive naturals, for example, 751743 + ... + 992251.

It is an arithmetic number, because the mean of its divisors is an integer number (15333955560).

Almost surely, 2^209723126473 is an apocalyptic number.

It is an amenable number.

209723126473 is a deficient number, since it is larger than the sum of its proper divisors (35620162487).

209723126473 is a wasteful number, since it uses less digits than its factorization.

209723126473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243456.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 209723126473 in words is "two hundred nine billion, seven hundred twenty-three million, one hundred twenty-six thousand, four hundred seventy-three".