487309 has 4 divisors (see below), whose sum is σ = 491004. Its totient is φ = 483616.

The previous prime is 487307. The next prime is 487313. The reversal of 487309 is 903784.

487309 = T₆ + T₇ + ... + T₁₄₂.

It is a happy number.

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 162409 + 324900 = 403^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 487309 - 2¹ = 487307 is a prime.

It is a super-2 number, since 2×487309² = 474940122962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (122751).

2⁴⁸⁷³⁰⁹ is an apocalyptic number.

It is an amenable number.

487309 is a deficient number, since it is larger than the sum of its proper divisors (3695).

487309 is a wasteful number, since it uses less digits than its factorization.

487309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 487309 is about 698.0752108477. The cubic root of 487309 is about 78.6927660057.

The spelling of 487309 in words is "four hundred eighty-seven thousand, three hundred nine".