487691 has 2 divisors, whose sum is σ = 487692. Its totient is φ = 487690.

The previous prime is 487681. The next prime is 487703. The reversal of 487691 is 196784.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 487691 - 2¹⁰ = 486667 is a prime.

It is a super-2 number, since 2×487691² = 475685022962, which contains 22 as substring.

It is a Sophie Germain prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 487691.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243845 + 243846.

It is an arithmetic number, because the mean of its divisors is an integer number (243846).

2⁴⁸⁷⁶⁹¹ is an apocalyptic number.

487691 is a deficient number, since it is larger than the sum of its proper divisors (1).

487691 is an equidigital number, since it uses as much as digits as its factorization.

487691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 487691 is about 698.3487667348. The cubic root of 487691 is about 78.7133229728.

The spelling of 487691 in words is "four hundred eighty-seven thousand, six hundred ninety-one".