947987 has 2 divisors, whose sum is σ = 947988. Its totient is φ = 947986.

The previous prime is 947963. The next prime is 948007. The reversal of 947987 is 789749.

It is a strong prime.

It is an emirp because it is prime and its reverse (789749) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 947987 - 2¹⁶ = 882451 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947987.

It is not a weakly prime, because it can be changed into another prime (947917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473993 + 473994.

It is an arithmetic number, because the mean of its divisors is an integer number (473994).

2⁹⁴⁷⁹⁸⁷ is an apocalyptic number.

947987 is a deficient number, since it is larger than the sum of its proper divisors (1).

947987 is an equidigital number, since it uses as much as digits as its factorization.

947987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 947987 is about 973.6462396579. The cubic root of 947987 is about 98.2352739466.

The spelling of 947987 in words is "nine hundred forty-seven thousand, nine hundred eighty-seven".