486916821 has 12 divisors (see below), whose sum is σ = 719681248. Its totient is φ = 317061864.

The previous prime is 486916813. The next prime is 486916849. The reversal of 486916821 is 128619684.

486916821 is a `hidden beast` number, since 486 + 9 + 168 + 2 + 1 = 666.

It is not a de Polignac number, because 486916821 - 2³ = 486916813 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 (486916621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 628705 + ... + 629478.

Almost surely, 2^486916821 is an apocalyptic number.

It is an amenable number.

486916821 is a deficient number, since it is larger than the sum of its proper divisors (232764427).

486916821 is a wasteful number, since it uses less digits than its factorization.

486916821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258232 (or 1258229 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 486916821 is about 22066.1918100972. The cubic root of 486916821 is about 786.7165008609.

The spelling of 486916821 in words is "four hundred eighty-six million, nine hundred sixteen thousand, eight hundred twenty-one".