7798457 has 2 divisors, whose sum is σ = 7798458. Its totient is φ = 7798456.

The previous prime is 7798421. The next prime is 7798463. The reversal of 7798457 is 7548977.

7798457 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5779216 + 2019241 = 2404^2 + 1421^2 .

It is an emirp because it is prime and its reverse (7548977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7798457 - 2⁸ = 7798201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7798657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3899228 + 3899229.

It is an arithmetic number, because the mean of its divisors is an integer number (3899229).

Almost surely, 2^7798457 is an apocalyptic number.

It is an amenable number.

7798457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7798457 is an equidigital number, since it uses as much as digits as its factorization.

7798457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 47.

The square root of 7798457 is about 2792.5717537782. The cubic root of 7798457 is about 198.3061702005.

The spelling of 7798457 in words is "seven million, seven hundred ninety-eight thousand, four hundred fifty-seven".