678987713 has 2 divisors, whose sum is σ = 678987714. Its totient is φ = 678987712.

The previous prime is 678987707. The next prime is 678987719. The reversal of 678987713 is 317789876.

It is a balanced prime because it is at equal distance from previous prime (678987707) and next prime (678987719).

It can be written as a sum of positive squares in only one way, i.e., 637411009 + 41576704 = 25247^2 + 6448^2 .

It is a cyclic number.

It is not a de Polignac number, because 678987713 - 2¹⁴ = 678971329 is a prime.

It is a super-2 number, since 2×678987713² = 922048628809940738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (678987719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339493856 + 339493857.

It is an arithmetic number, because the mean of its divisors is an integer number (339493857).

Almost surely, 2^678987713 is an apocalyptic number.

It is an amenable number.

678987713 is a deficient number, since it is larger than the sum of its proper divisors (1).

678987713 is an equidigital number, since it uses as much as digits as its factorization.

678987713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 56.

The square root of 678987713 is about 26057.3926746327. The cubic root of 678987713 is about 878.9293595350.

The spelling of 678987713 in words is "six hundred seventy-eight million, nine hundred eighty-seven thousand, seven hundred thirteen".