7892939081 has 2 divisors, whose sum is σ = 7892939082. Its totient is φ = 7892939080.

The previous prime is 7892939063. The next prime is 7892939137. The reversal of 7892939081 is 1809392987.

It is an a-pointer prime, because the next prime (7892939137) can be obtained adding 7892939081 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6278185225 + 1614753856 = 79235^2 + 40184^2 .

It is a cyclic number.

It is not a de Polignac number, because 7892939081 - 2²⁶ = 7825830217 is a prime.

It is a super-2 number, since 2×7892939081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7892930081) 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, 3946469540 + 3946469541.

It is an arithmetic number, because the mean of its divisors is an integer number (3946469541).

Almost surely, 2^7892939081 is an apocalyptic number.

It is an amenable number.

7892939081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7892939081 is an equidigital number, since it uses as much as digits as its factorization.

7892939081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 7892939081 is about 88842.2145210260. The cubic root of 7892939081 is about 1991.0381594374.

The spelling of 7892939081 in words is "seven billion, eight hundred ninety-two million, nine hundred thirty-nine thousand, eighty-one".