7123684817 has 2 divisors, whose sum is σ = 7123684818. Its totient is φ = 7123684816.

The previous prime is 7123684783. The next prime is 7123684831. The reversal of 7123684817 is 7184863217.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5602372801 + 1521312016 = 74849^2 + 39004^2 .

It is a cyclic number.

It is not a de Polignac number, because 7123684817 - 2¹⁰ = 7123683793 is a prime.

It is not a weakly prime, because it can be changed into another prime (7123684847) 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, 3561842408 + 3561842409.

It is an arithmetic number, because the mean of its divisors is an integer number (3561842409).

Almost surely, 2^7123684817 is an apocalyptic number.

It is an amenable number.

7123684817 is a deficient number, since it is larger than the sum of its proper divisors (1).

7123684817 is an equidigital number, since it uses as much as digits as its factorization.

7123684817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 7123684817 is about 84401.9242493914. The cubic root of 7123684817 is about 1924.1321610835.

The spelling of 7123684817 in words is "seven billion, one hundred twenty-three million, six hundred eighty-four thousand, eight hundred seventeen".