678288317 has 4 divisors (see below), whose sum is σ = 775186656. Its totient is φ = 581389980.

The previous prime is 678288307. The next prime is 678288319. The reversal of 678288317 is 713882876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678288317 - 2¹² = 678284221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678288319) 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 in 3 ways as a sum of consecutive naturals, for example, 48449159 + ... + 48449172.

It is an arithmetic number, because the mean of its divisors is an integer number (193796664).

Almost surely, 2^678288317 is an apocalyptic number.

It is an amenable number.

678288317 is a deficient number, since it is larger than the sum of its proper divisors (96898339).

678288317 is an equidigital number, since it uses as much as digits as its factorization.

678288317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96898338.

The product of its digits is 903168, while the sum is 50.

The square root of 678288317 is about 26043.9689179664. The cubic root of 678288317 is about 878.6274734317.

The spelling of 678288317 in words is "six hundred seventy-eight million, two hundred eighty-eight thousand, three hundred seventeen".