978287 has 2 divisors, whose sum is σ = 978288. Its totient is φ = 978286.

The previous prime is 978283. The next prime is 978323. The reversal of 978287 is 782879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978287 - 2² = 978283 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978287.

It is not a weakly prime, because it can be changed into another prime (978283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489143 + 489144.

It is an arithmetic number, because the mean of its divisors is an integer number (489144).

2⁹⁷⁸²⁸⁷ is an apocalyptic number.

978287 is a deficient number, since it is larger than the sum of its proper divisors (1).

978287 is an equidigital number, since it uses as much as digits as its factorization.

978287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 978287 is about 989.0839195943. The cubic root of 978287 is about 99.2709308325.

The spelling of 978287 in words is "nine hundred seventy-eight thousand, two hundred eighty-seven".