653550623 has 4 divisors (see below), whose sum is σ = 712964328. Its totient is φ = 594136920.

The previous prime is 653550607. The next prime is 653550631. The reversal of 653550623 is 326055356.

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 653550623 - 2⁴ = 653550607 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 (653552623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29706836 + ... + 29706857.

It is an arithmetic number, because the mean of its divisors is an integer number (178241082).

Almost surely, 2^653550623 is an apocalyptic number.

653550623 is a deficient number, since it is larger than the sum of its proper divisors (59413705).

653550623 is a wasteful number, since it uses less digits than its factorization.

653550623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59413704.

The product of its (nonzero) digits is 81000, while the sum is 35.

The square root of 653550623 is about 25564.6361796917. The cubic root of 653550623 is about 867.8135182187.

The spelling of 653550623 in words is "six hundred fifty-three million, five hundred fifty thousand, six hundred twenty-three".