7042875781 has 2 divisors, whose sum is σ = 7042875782. Its totient is φ = 7042875780.

The previous prime is 7042875761. The next prime is 7042875809. The reversal of 7042875781 is 1875782407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6894645156 + 148230625 = 83034^2 + 12175^2 .

It is a cyclic number.

It is not a de Polignac number, because 7042875781 - 2¹³ = 7042867589 is a prime.

It is a super-2 number, since 2×7042875781² = 99204198533192719922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7042875761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521437890 + 3521437891.

It is an arithmetic number, because the mean of its divisors is an integer number (3521437891).

Almost surely, 2^7042875781 is an apocalyptic number.

It is an amenable number.

7042875781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7042875781 is an equidigital number, since it uses as much as digits as its factorization.

7042875781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 878080, while the sum is 49.

The square root of 7042875781 is about 83921.8432888601. The cubic root of 7042875781 is about 1916.8288746130.

The spelling of 7042875781 in words is "seven billion, forty-two million, eight hundred seventy-five thousand, seven hundred eighty-one".