209007233543 has 4 divisors (see below), whose sum is σ = 209028590208. Its totient is φ = 208985876880.

The previous prime is 209007233527. The next prime is 209007233549. The reversal of 209007233543 is 345332700902.

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

It is a cyclic number.

It is not a de Polignac number, because 209007233543 - 2⁴ = 209007233527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 209007233497 and 209007233506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209007233549) 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, 10663646 + ... + 10683227.

It is an arithmetic number, because the mean of its divisors is an integer number (52257147552).

Almost surely, 2^209007233543 is an apocalyptic number.

209007233543 is a deficient number, since it is larger than the sum of its proper divisors (21356665).

209007233543 is an equidigital number, since it uses as much as digits as its factorization.

209007233543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21356664.

The product of its (nonzero) digits is 136080, while the sum is 38.

The spelling of 209007233543 in words is "two hundred nine billion, seven million, two hundred thirty-three thousand, five hundred forty-three".