653621623 has 8 divisors (see below), whose sum is σ = 660699936. Its totient is φ = 646557600.

The previous prime is 653621587. The next prime is 653621711. The reversal of 653621623 is 326126356.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653621623 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 (653621123) 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, 106293 + ... + 112273.

It is an arithmetic number, because the mean of its divisors is an integer number (82587492).

Almost surely, 2^653621623 is an apocalyptic number.

653621623 is a deficient number, since it is larger than the sum of its proper divisors (7078313).

653621623 is a wasteful number, since it uses less digits than its factorization.

653621623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145.

The product of its digits is 38880, while the sum is 34.

The square root of 653621623 is about 25566.0247789914. The cubic root of 653621623 is about 867.8449427310.

Adding to 653621623 its reverse (326126356), we get a palindrome (979747979).

The spelling of 653621623 in words is "six hundred fifty-three million, six hundred twenty-one thousand, six hundred twenty-three".