987678547 has 2 divisors, whose sum is σ = 987678548. Its totient is φ = 987678546.

The previous prime is 987678457. The next prime is 987678613. The reversal of 987678547 is 745876789.

Together with previous prime (987678457) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 987678547 - 2¹¹ = 987676499 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (987678947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493839273 + 493839274.

It is an arithmetic number, because the mean of its divisors is an integer number (493839274).

Almost surely, 2^987678547 is an apocalyptic number.

987678547 is a deficient number, since it is larger than the sum of its proper divisors (1).

987678547 is an equidigital number, since it uses as much as digits as its factorization.

987678547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 61.

The square root of 987678547 is about 31427.3534838682. The cubic root of 987678547 is about 995.8758638831.

The spelling of 987678547 in words is "nine hundred eighty-seven million, six hundred seventy-eight thousand, five hundred forty-seven".