653623543 has 4 divisors (see below), whose sum is σ = 653757120. Its totient is φ = 653489968.

The previous prime is 653623513. The next prime is 653623559. The reversal of 653623543 is 345326356.

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 653623543 - 2¹⁷ = 653492471 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 (653623513) 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, 59158 + ... + 69331.

It is an arithmetic number, because the mean of its divisors is an integer number (163439280).

Almost surely, 2^653623543 is an apocalyptic number.

653623543 is a deficient number, since it is larger than the sum of its proper divisors (133577).

653623543 is a wasteful number, since it uses less digits than its factorization.

653623543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133576.

The product of its digits is 194400, while the sum is 37.

The square root of 653623543 is about 25566.0623287983. The cubic root of 653623543 is about 867.8457924890.

Adding to 653623543 its reverse (345326356), we get a palindrome (998949899).

The spelling of 653623543 in words is "six hundred fifty-three million, six hundred twenty-three thousand, five hundred forty-three".