7042875809 has 2 divisors, whose sum is σ = 7042875810. Its totient is φ = 7042875808.

The previous prime is 7042875781. The next prime is 7042875811. The reversal of 7042875809 is 9085782407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4836507025 + 2206368784 = 69545^2 + 46972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7042875809 is a prime.

It is a super-3 number, since 3×7042875809³ (a number of 31 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 7042875811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7042175809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521437904 + 3521437905.

It is an arithmetic number, because the mean of its divisors is an integer number (3521437905).

Almost surely, 2^7042875809 is an apocalyptic number.

It is an amenable number.

7042875809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7042875809 is an equidigital number, since it uses as much as digits as its factorization.

7042875809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 7042875809 is about 83921.8434556820. The cubic root of 7042875809 is about 1916.8288771532.

The spelling of 7042875809 in words is "seven billion, forty-two million, eight hundred seventy-five thousand, eight hundred nine".