7474812809 has 2 divisors, whose sum is σ = 7474812810. Its totient is φ = 7474812808.

The previous prime is 7474812797. The next prime is 7474812811. The reversal of 7474812809 is 9082184747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7429922809 + 44890000 = 86197^2 + 6700^2 .

It is a cyclic number.

It is not a de Polignac number, because 7474812809 - 2²⁴ = 7458035593 is a prime.

Together with 7474812811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7474815809) 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, 3737406404 + 3737406405.

It is an arithmetic number, because the mean of its divisors is an integer number (3737406405).

Almost surely, 2^7474812809 is an apocalyptic number.

It is an amenable number.

7474812809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7474812809 is an equidigital number, since it uses as much as digits as its factorization.

7474812809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 7474812809 is about 86456.9997686711. Note that the first 3 decimals coincide. The cubic root of 7474812809 is about 1955.2401515545.

The spelling of 7474812809 in words is "seven billion, four hundred seventy-four million, eight hundred twelve thousand, eight hundred nine".