1678711 has 2 divisors, whose sum is σ = 1678712. Its totient is φ = 1678710.

The previous prime is 1678697. The next prime is 1678717. The reversal of 1678711 is 1178761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1678711 - 2⁵ = 1678679 is a prime.

It is a Chen prime.

1678711 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1678717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839355 + 839356.

It is an arithmetic number, because the mean of its divisors is an integer number (839356).

2^1678711 is an apocalyptic number.

1678711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678711 is an equidigital number, since it uses as much as digits as its factorization.

1678711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 31.

The square root of 1678711 is about 1295.6508017209. The cubic root of 1678711 is about 118.8480276436.

The spelling of 1678711 in words is "one million, six hundred seventy-eight thousand, seven hundred eleven".