486667721 has 8 divisors (see below), whose sum is σ = 520609320. Its totient is φ = 453316608.

The previous prime is 486667717. The next prime is 486667723. The reversal of 486667721 is 127766684.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76807696 + 409860025 = 8764^2 + 20245^2 .

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 486667721 - 2² = 486667717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (486667723) 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, 145916 + ... + 149213.

It is an arithmetic number, because the mean of its divisors is an integer number (65076165).

Almost surely, 2^486667721 is an apocalyptic number.

It is an amenable number.

486667721 is a deficient number, since it is larger than the sum of its proper divisors (33941599).

486667721 is a wasteful number, since it uses less digits than its factorization.

486667721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295243.

The product of its digits is 677376, while the sum is 47.

The square root of 486667721 is about 22060.5467067342. The cubic root of 486667721 is about 786.5823201684.

The spelling of 486667721 in words is "four hundred eighty-six million, six hundred sixty-seven thousand, seven hundred twenty-one".