604620721 has 8 divisors (see below), whose sum is σ = 626139360. Its totient is φ = 583441152.

The previous prime is 604620713. The next prime is 604620763. The reversal of 604620721 is 127026406.

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 604620721 - 2³ = 604620713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 604620721.

It is not an unprimeable number, because it can be changed into a prime (604620221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81136 + ... + 88273.

It is an arithmetic number, because the mean of its divisors is an integer number (78267420).

Almost surely, 2^604620721 is an apocalyptic number.

It is an amenable number.

604620721 is a deficient number, since it is larger than the sum of its proper divisors (21518639).

604620721 is a wasteful number, since it uses less digits than its factorization.

604620721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169535.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 604620721 is about 24589.0366017052. The cubic root of 604620721 is about 845.5922792282.

The spelling of 604620721 in words is "six hundred four million, six hundred twenty thousand, seven hundred twenty-one".