678656327 has 2 divisors, whose sum is σ = 678656328. Its totient is φ = 678656326.

The previous prime is 678656287. The next prime is 678656351. The reversal of 678656327 is 723656876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678656327 - 2¹² = 678652231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678656387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339328163 + 339328164.

It is an arithmetic number, because the mean of its divisors is an integer number (339328164).

Almost surely, 2^678656327 is an apocalyptic number.

678656327 is a deficient number, since it is larger than the sum of its proper divisors (1).

678656327 is an equidigital number, since it uses as much as digits as its factorization.

678656327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 50.

The square root of 678656327 is about 26051.0331273061. The cubic root of 678656327 is about 878.7863464992.

The spelling of 678656327 in words is "six hundred seventy-eight million, six hundred fifty-six thousand, three hundred twenty-seven".