1671679 has 2 divisors, whose sum is σ = 1671680. Its totient is φ = 1671678.

The previous prime is 1671671. The next prime is 1671689. The reversal of 1671679 is 9761761.

It is a weak prime.

It is an emirp because it is prime and its reverse (9761761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1671679 - 2³ = 1671671 is a prime.

1671679 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835839 + 835840.

It is an arithmetic number, because the mean of its divisors is an integer number (835840).

2^1671679 is an apocalyptic number.

1671679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671679 is an equidigital number, since it uses as much as digits as its factorization.

1671679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 37.

The square root of 1671679 is about 1292.9342597364. The cubic root of 1671679 is about 118.6818467654.

The spelling of 1671679 in words is "one million, six hundred seventy-one thousand, six hundred seventy-nine".