8207903681 has 2 divisors, whose sum is σ = 8207903682. Its totient is φ = 8207903680.

The previous prime is 8207903677. The next prime is 8207903699. The reversal of 8207903681 is 1863097028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6982273600 + 1225630081 = 83560^2 + 35009^2 .

It is a cyclic number.

It is not a de Polignac number, because 8207903681 - 2² = 8207903677 is a prime.

It is a super-2 number, since 2×8207903681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8207903881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4103951840 + 4103951841.

It is an arithmetic number, because the mean of its divisors is an integer number (4103951841).

Almost surely, 2^8207903681 is an apocalyptic number.

It is an amenable number.

8207903681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8207903681 is an equidigital number, since it uses as much as digits as its factorization.

8207903681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 8207903681 is about 90597.4816482224. The cubic root of 8207903681 is about 2017.1773536462.

The spelling of 8207903681 in words is "eight billion, two hundred seven million, nine hundred three thousand, six hundred eighty-one".