678704827 has 2 divisors, whose sum is σ = 678704828. Its totient is φ = 678704826.

The previous prime is 678704809. The next prime is 678704869. The reversal of 678704827 is 728407876.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678704827 - 2¹⁹ = 678180539 is a prime.

It is not a weakly prime, because it can be changed into another prime (678704527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339352413 + 339352414.

It is an arithmetic number, because the mean of its divisors is an integer number (339352414).

Almost surely, 2^678704827 is an apocalyptic number.

678704827 is a deficient number, since it is larger than the sum of its proper divisors (1).

678704827 is an equidigital number, since it uses as much as digits as its factorization.

678704827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The square root of 678704827 is about 26051.9639758695. The cubic root of 678704827 is about 878.8072800807.

The spelling of 678704827 in words is "six hundred seventy-eight million, seven hundred four thousand, eight hundred twenty-seven".