653318421 has 24 divisors (see below), whose sum is σ = 1014601824. Its totient is φ = 372849120.

The previous prime is 653318359. The next prime is 653318429. The reversal of 653318421 is 124813356.

653318421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 653318421 - 2¹⁰ = 653317397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653318429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135966 + ... + 140688.

It is an arithmetic number, because the mean of its divisors is an integer number (42275076).

Almost surely, 2^653318421 is an apocalyptic number.

It is an amenable number.

653318421 is a deficient number, since it is larger than the sum of its proper divisors (361283403).

653318421 is a wasteful number, since it uses less digits than its factorization.

653318421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681 (or 5674 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 653318421 is about 25560.0943073378. The cubic root of 653318421 is about 867.7107300046.

The spelling of 653318421 in words is "six hundred fifty-three million, three hundred eighteen thousand, four hundred twenty-one".