488625821 has 4 divisors (see below), whose sum is σ = 488791644. Its totient is φ = 488460000.

The previous prime is 488625791. The next prime is 488625833. The reversal of 488625821 is 128526884.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 244922500 + 243703321 = 15650^2 + 15611^2 .

It is a cyclic number.

It is not a de Polignac number, because 488625821 - 2⁶ = 488625757 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 (488625121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78410 + ... + 84411.

It is an arithmetic number, because the mean of its divisors is an integer number (122197911).

Almost surely, 2^488625821 is an apocalyptic number.

It is an amenable number.

488625821 is a deficient number, since it is larger than the sum of its proper divisors (165823).

488625821 is a wasteful number, since it uses less digits than its factorization.

488625821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165822.

The product of its digits is 245760, while the sum is 44.

The square root of 488625821 is about 22104.8822887615. The cubic root of 488625821 is about 787.6358423929.

The spelling of 488625821 in words is "four hundred eighty-eight million, six hundred twenty-five thousand, eight hundred twenty-one".