487812821 has 8 divisors (see below), whose sum is σ = 514483200. Its totient is φ = 461242080.

The previous prime is 487812817. The next prime is 487812839. The reversal of 487812821 is 128218784.

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 487812821 - 2² = 487812817 is a prime.

It is a super-2 number, since 2×487812821² = 475922696663956082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487812811) 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, 14741 + ... + 34538.

It is an arithmetic number, because the mean of its divisors is an integer number (64310400).

Almost surely, 2^487812821 is an apocalyptic number.

It is an amenable number.

487812821 is a deficient number, since it is larger than the sum of its proper divisors (26670379).

487812821 is a wasteful number, since it uses less digits than its factorization.

487812821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49819.

The product of its digits is 57344, while the sum is 41.

The square root of 487812821 is about 22086.4850304434. The cubic root of 487812821 is about 787.1987639656.

The spelling of 487812821 in words is "four hundred eighty-seven million, eight hundred twelve thousand, eight hundred twenty-one".