5978639 has 2 divisors, whose sum is σ = 5978640. Its totient is φ = 5978638.

The previous prime is 5978633. The next prime is 5978653. The reversal of 5978639 is 9368795.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5978639 - 2¹² = 5974543 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 5978593 and 5978602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5978633) 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, 2989319 + 2989320.

It is an arithmetic number, because the mean of its divisors is an integer number (2989320).

Almost surely, 2^5978639 is an apocalyptic number.

5978639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5978639 is an equidigital number, since it uses as much as digits as its factorization.

5978639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 5978639 is about 2445.1255591482. The cubic root of 5978639 is about 181.4961611302.

The spelling of 5978639 in words is "five million, nine hundred seventy-eight thousand, six hundred thirty-nine".