1679687 has 2 divisors, whose sum is σ = 1679688. Its totient is φ = 1679686.

The previous prime is 1679683. The next prime is 1679693. The reversal of 1679687 is 7869761.

It is a weak prime.

It is an emirp because it is prime and its reverse (7869761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1679687 - 2² = 1679683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1679681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839843 + 839844.

It is an arithmetic number, because the mean of its divisors is an integer number (839844).

2^1679687 is an apocalyptic number.

1679687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679687 is an equidigital number, since it uses as much as digits as its factorization.

1679687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 1679687 is about 1296.0273916858. The cubic root of 1679687 is about 118.8710558683.

The spelling of 1679687 in words is "one million, six hundred seventy-nine thousand, six hundred eighty-seven".