573644721 has 8 divisors (see below), whose sum is σ = 823695040. Its totient is φ = 353012112.

The previous prime is 573644717. The next prime is 573644723. The reversal of 573644721 is 127446375.

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

It is not a de Polignac number, because 573644721 - 2² = 573644717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 14708839 = 573644721 / (5 + 7 + 3 + 6 + 4 + 4 + 7 + 2 + 1).

It is a Duffinian number.

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 573644721.

It is not an unprimeable number, because it can be changed into a prime (573644723) 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, 7354381 + ... + 7354458.

It is an arithmetic number, because the mean of its divisors is an integer number (102961880).

Almost surely, 2^573644721 is an apocalyptic number.

It is an amenable number.

573644721 is a deficient number, since it is larger than the sum of its proper divisors (250050319).

573644721 is a wasteful number, since it uses less digits than its factorization.

573644721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14708855.

The product of its digits is 141120, while the sum is 39.

The square root of 573644721 is about 23950.8814242817. The cubic root of 573644721 is about 830.8979110311.

The spelling of 573644721 in words is "five hundred seventy-three million, six hundred forty-four thousand, seven hundred twenty-one".