7028839 has 2 divisors, whose sum is σ = 7028840. Its totient is φ = 7028838.

The previous prime is 7028831. The next prime is 7028843. The reversal of 7028839 is 9388207.

It is a strong prime.

It is an emirp because it is prime and its reverse (9388207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7028839 - 2³ = 7028831 is a prime.

7028839 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7028798 and 7028807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7028831) 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, 3514419 + 3514420.

It is an arithmetic number, because the mean of its divisors is an integer number (3514420).

Almost surely, 2^7028839 is an apocalyptic number.

7028839 is a deficient number, since it is larger than the sum of its proper divisors (1).

7028839 is an equidigital number, since it uses as much as digits as its factorization.

7028839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 7028839 is about 2651.1957679508. The cubic root of 7028839 is about 191.5554584450. Note that the first 3 decimals are identical.

The spelling of 7028839 in words is "seven million, twenty-eight thousand, eight hundred thirty-nine".