209623053 has 8 divisors (see below), whose sum is σ = 281212768. Its totient is φ = 138891024.

The previous prime is 209623033. The next prime is 209623061. The reversal of 209623053 is 350326902.

209623053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209623053 - 2⁵ = 209623021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209623053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209623033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213850 + ... + 214827.

It is an arithmetic number, because the mean of its divisors is an integer number (35151596).

Almost surely, 2^209623053 is an apocalyptic number.

It is an amenable number.

209623053 is a deficient number, since it is larger than the sum of its proper divisors (71589715).

209623053 is a wasteful number, since it uses less digits than its factorization.

209623053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428843.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 209623053 is about 14478.3649974712. The cubic root of 209623053 is about 594.0363404401.

Adding to 209623053 its reverse (350326902), we get a palindrome (559949955).

The spelling of 209623053 in words is "two hundred nine million, six hundred twenty-three thousand, fifty-three".