678680237 has 2 divisors, whose sum is σ = 678680238. Its totient is φ = 678680236.

The previous prime is 678680153. The next prime is 678680279. The reversal of 678680237 is 732086876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660181636 + 18498601 = 25694^2 + 4301^2 .

It is a cyclic number.

It is not a de Polignac number, because 678680237 - 2¹⁰ = 678679213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678680191 and 678680200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678680537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339340118 + 339340119.

It is an arithmetic number, because the mean of its divisors is an integer number (339340119).

Almost surely, 2^678680237 is an apocalyptic number.

It is an amenable number.

678680237 is a deficient number, since it is larger than the sum of its proper divisors (1).

678680237 is an equidigital number, since it uses as much as digits as its factorization.

678680237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 678680237 is about 26051.4920302082. The cubic root of 678680237 is about 878.7966666637.

The spelling of 678680237 in words is "six hundred seventy-eight million, six hundred eighty thousand, two hundred thirty-seven".