987678613 has 2 divisors, whose sum is σ = 987678614. Its totient is φ = 987678612.

The previous prime is 987678547. The next prime is 987678623. The reversal of 987678613 is 316876789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894787569 + 92891044 = 29913^2 + 9638^2 .

It is an emirp because it is prime and its reverse (316876789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987678613 - 2¹⁷ = 987547541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987678623) 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, 493839306 + 493839307.

It is an arithmetic number, because the mean of its divisors is an integer number (493839307).

Almost surely, 2^987678613 is an apocalyptic number.

It is an amenable number.

987678613 is a deficient number, since it is larger than the sum of its proper divisors (1).

987678613 is an equidigital number, since it uses as much as digits as its factorization.

987678613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 55.

The square root of 987678613 is about 31427.3545339088. The cubic root of 987678613 is about 995.8758860657.

The spelling of 987678613 in words is "nine hundred eighty-seven million, six hundred seventy-eight thousand, six hundred thirteen".