678047 has 2 divisors, whose sum is σ = 678048. Its totient is φ = 678046.

The previous prime is 678037. The next prime is 678061. The reversal of 678047 is 740876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678047 - 2⁶ = 677983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339023 + 339024.

It is an arithmetic number, because the mean of its divisors is an integer number (339024).

2⁶⁷⁸⁰⁴⁷ is an apocalyptic number.

678047 is a deficient number, since it is larger than the sum of its proper divisors (1).

678047 is an equidigital number, since it uses as much as digits as its factorization.

678047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 678047 is about 823.4360934523. The cubic root of 678047 is about 87.8523263619.

The spelling of 678047 in words is "six hundred seventy-eight thousand, forty-seven".