487391 has 2 divisors, whose sum is σ = 487392. Its totient is φ = 487390.

The previous prime is 487387. The next prime is 487397. The reversal of 487391 is 193784.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 487391 - 2² = 487387 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243695 + 243696.

It is an arithmetic number, because the mean of its divisors is an integer number (243696).

2⁴⁸⁷³⁹¹ is an apocalyptic number.

487391 is a deficient number, since it is larger than the sum of its proper divisors (1).

487391 is an equidigital number, since it uses as much as digits as its factorization.

487391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 487391 is about 698.1339413035. The cubic root of 487391 is about 78.6971796631.

It can be divided in two parts, 487 and 391, that added together give a palindrome (878).

The spelling of 487391 in words is "four hundred eighty-seven thousand, three hundred ninety-one".