7828499209 has 2 divisors, whose sum is σ = 7828499210. Its totient is φ = 7828499208.

The previous prime is 7828499179. The next prime is 7828499227. The reversal of 7828499209 is 9029948287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7787180025 + 41319184 = 88245^2 + 6428^2 .

It is an emirp because it is prime and its reverse (9029948287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7828499209 - 2⁹ = 7828498697 is a prime.

It is a super-2 number, since 2×7828499209² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7828499509) 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, 3914249604 + 3914249605.

It is an arithmetic number, because the mean of its divisors is an integer number (3914249605).

Almost surely, 2^7828499209 is an apocalyptic number.

It is an amenable number.

7828499209 is a deficient number, since it is larger than the sum of its proper divisors (1).

7828499209 is an equidigital number, since it uses as much as digits as its factorization.

7828499209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 7828499209 is about 88478.8065527559. The cubic root of 7828499209 is about 1985.6049066379.

The spelling of 7828499209 in words is "seven billion, eight hundred twenty-eight million, four hundred ninety-nine thousand, two hundred nine".