7628209 has 2 divisors, whose sum is σ = 7628210. Its totient is φ = 7628208.

The previous prime is 7628197. The next prime is 7628221. The reversal of 7628209 is 9028267.

It is a balanced prime because it is at equal distance from previous prime (7628197) and next prime (7628221).

It can be written as a sum of positive squares in only one way, i.e., 7617600 + 10609 = 2760^2 + 103^2 .

It is an emirp because it is prime and its reverse (9028267) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7628209 - 2⁷ = 7628081 is a prime.

It is not a weakly prime, because it can be changed into another prime (7628609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3814104 + 3814105.

It is an arithmetic number, because the mean of its divisors is an integer number (3814105).

Almost surely, 2^7628209 is an apocalyptic number.

It is an amenable number.

7628209 is a deficient number, since it is larger than the sum of its proper divisors (1).

7628209 is an equidigital number, since it uses as much as digits as its factorization.

7628209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 7628209 is about 2761.9212515928. The cubic root of 7628209 is about 196.8524666912.

The spelling of 7628209 in words is "seven million, six hundred twenty-eight thousand, two hundred nine".