653349621 has 8 divisors (see below), whose sum is σ = 874372320. Its totient is φ = 433946672.

The previous prime is 653349617. The next prime is 653349647. The reversal of 653349621 is 126943356.

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

It is a cyclic number.

It is not a de Polignac number, because 653349621 - 2² = 653349617 is a prime.

It is a super-5 number, since 5×653349621⁵ (a number of 45 digits) contains 55555 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 653349621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653349601) 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 7 ways as a sum of consecutive naturals, for example, 403995 + ... + 405608.

It is an arithmetic number, because the mean of its divisors is an integer number (109296540).

Almost surely, 2^653349621 is an apocalyptic number.

It is an amenable number.

653349621 is a deficient number, since it is larger than the sum of its proper divisors (221022699).

653349621 is a wasteful number, since it uses less digits than its factorization.

653349621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809875.

The product of its digits is 116640, while the sum is 39.

The square root of 653349621 is about 25560.7046264378. The cubic root of 653349621 is about 867.7245426382.

The spelling of 653349621 in words is "six hundred fifty-three million, three hundred forty-nine thousand, six hundred twenty-one".