209289452893 has 4 divisors (see below), whose sum is σ = 209291679808. Its totient is φ = 209287225980.

The previous prime is 209289452881. The next prime is 209289452903. The reversal of 209289452893 is 398254982902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 209289452893 - 2⁵ = 209289452861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209289452293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965973 + ... + 1162618.

It is an arithmetic number, because the mean of its divisors is an integer number (52322919952).

Almost surely, 2^209289452893 is an apocalyptic number.

It is an amenable number.

209289452893 is a deficient number, since it is larger than the sum of its proper divisors (2226915).

209289452893 is an equidigital number, since it uses as much as digits as its factorization.

209289452893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226914.

The product of its (nonzero) digits is 22394880, while the sum is 61.

The spelling of 209289452893 in words is "two hundred nine billion, two hundred eighty-nine million, four hundred fifty-two thousand, eight hundred ninety-three".