1678613 has 2 divisors, whose sum is σ = 1678614. Its totient is φ = 1678612.

The previous prime is 1678603. The next prime is 1678627. The reversal of 1678613 is 3168761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1067089 + 611524 = 1033^2 + 782^2 .

It is a cyclic number.

It is not a de Polignac number, because 1678613 - 2¹⁰ = 1677589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1678613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1678603) 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, 839306 + 839307.

It is an arithmetic number, because the mean of its divisors is an integer number (839307).

2^1678613 is an apocalyptic number.

It is an amenable number.

1678613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678613 is an equidigital number, since it uses as much as digits as its factorization.

1678613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 1678613 is about 1295.6129823369. The cubic root of 1678613 is about 118.8457148902.

The spelling of 1678613 in words is "one million, six hundred seventy-eight thousand, six hundred thirteen".