841987 has 2 divisors, whose sum is σ = 841988. Its totient is φ = 841986.

The previous prime is 841979. The next prime is 842003. The reversal of 841987 is 789148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 841987 - 2³ = 841979 is a prime.

It is not a weakly prime, because it can be changed into another prime (841927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420993 + 420994.

It is an arithmetic number, because the mean of its divisors is an integer number (420994).

2⁸⁴¹⁹⁸⁷ is an apocalyptic number.

841987 is a deficient number, since it is larger than the sum of its proper divisors (1).

841987 is an equidigital number, since it uses as much as digits as its factorization.

841987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 841987 is about 917.5984960755. The cubic root of 841987 is about 94.4282183069.

The spelling of 841987 in words is "eight hundred forty-one thousand, nine hundred eighty-seven".