487681 has 2 divisors, whose sum is σ = 487682. Its totient is φ = 487680.

The previous prime is 487657. The next prime is 487691. The reversal of 487681 is 186784.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462400 + 25281 = 680^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 487681 - 2⁵ = 487649 is a prime.

It is a super-2 number, since 2×487681² = 475665515522, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (487601) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243840 + 243841.

It is an arithmetic number, because the mean of its divisors is an integer number (243841).

2⁴⁸⁷⁶⁸¹ is an apocalyptic number.

It is an amenable number.

487681 is a deficient number, since it is larger than the sum of its proper divisors (1).

487681 is an equidigital number, since it uses as much as digits as its factorization.

487681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 487681 is about 698.3416069518. The cubic root of 487681 is about 78.7127849691.

The spelling of 487681 in words is "four hundred eighty-seven thousand, six hundred eighty-one".