7028389 has 2 divisors, whose sum is σ = 7028390. Its totient is φ = 7028388.

The previous prime is 7028381. The next prime is 7028401. The reversal of 7028389 is 9838207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4601025 + 2427364 = 2145^2 + 1558^2 .

It is an emirp because it is prime and its reverse (9838207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7028389 - 2³ = 7028381 is a prime.

It is a Chen prime.

7028389 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7028381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3514194 + 3514195.

It is an arithmetic number, because the mean of its divisors is an integer number (3514195).

Almost surely, 2^7028389 is an apocalyptic number.

It is an amenable number.

7028389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7028389 is an equidigital number, since it uses as much as digits as its factorization.

7028389 is an evil number, because the sum of its binary digits is even.

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

The square root of 7028389 is about 2651.1108992270. The cubic root of 7028389 is about 191.5513704395.

The spelling of 7028389 in words is "seven million, twenty-eight thousand, three hundred eighty-nine".