653344123 has 4 divisors (see below), whose sum is σ = 653427640. Its totient is φ = 653260608.

The previous prime is 653344079. The next prime is 653344129. The reversal of 653344123 is 321443356.

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 653344123 - 2¹³ = 653335931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653344129) 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 3 ways as a sum of consecutive naturals, for example, 28653 + ... + 46126.

It is an arithmetic number, because the mean of its divisors is an integer number (163356910).

Almost surely, 2^653344123 is an apocalyptic number.

653344123 is a deficient number, since it is larger than the sum of its proper divisors (83517).

653344123 is an equidigital number, since it uses as much as digits as its factorization.

653344123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83516.

The product of its digits is 25920, while the sum is 31.

The square root of 653344123 is about 25560.5970783157. The cubic root of 653344123 is about 867.7221086361.

Adding to 653344123 its reverse (321443356), we get a palindrome (974787479).

The spelling of 653344123 in words is "six hundred fifty-three million, three hundred forty-four thousand, one hundred twenty-three".