209232953 has 4 divisors (see below), whose sum is σ = 212179968. Its totient is φ = 206285940.

The previous prime is 209232931. The next prime is 209232967. The reversal of 209232953 is 359232902.

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 209232953 - 2¹² = 209228857 is a prime.

It is a super-2 number, since 2×209232953² = 87556857242200418, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (209232253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1473401 + ... + 1473542.

It is an arithmetic number, because the mean of its divisors is an integer number (53044992).

Almost surely, 2^209232953 is an apocalyptic number.

It is an amenable number.

209232953 is a deficient number, since it is larger than the sum of its proper divisors (2947015).

209232953 is an equidigital number, since it uses as much as digits as its factorization.

209232953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947014.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 209232953 is about 14464.8868989702. The cubic root of 209232953 is about 593.6676191078.

The spelling of 209232953 in words is "two hundred nine million, two hundred thirty-two thousand, nine hundred fifty-three".