7985034781 has 2 divisors, whose sum is σ = 7985034782. Its totient is φ = 7985034780.

The previous prime is 7985034767. The next prime is 7985034803. The reversal of 7985034781 is 1874305897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7804132281 + 180902500 = 88341^2 + 13450^2 .

It is a cyclic number.

It is not a de Polignac number, because 7985034781 - 2²³ = 7976646173 is a prime.

It is a super-2 number, since 2×7985034781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7985034881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992517390 + 3992517391.

It is an arithmetic number, because the mean of its divisors is an integer number (3992517391).

Almost surely, 2^7985034781 is an apocalyptic number.

It is an amenable number.

7985034781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985034781 is an equidigital number, since it uses as much as digits as its factorization.

7985034781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 7985034781 is about 89359.0218220858. The cubic root of 7985034781 is about 1998.7521199763.

The spelling of 7985034781 in words is "seven billion, nine hundred eighty-five million, thirty-four thousand, seven hundred eighty-one".