7084640861 has 2 divisors, whose sum is σ = 7084640862. Its totient is φ = 7084640860.

The previous prime is 7084640851. The next prime is 7084640873. The reversal of 7084640861 is 1680464807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4965879961 + 2118760900 = 70469^2 + 46030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7084640861 is a prime.

It is a super-2 number, since 2×7084640861² (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 (7084640851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3542320430 + 3542320431.

It is an arithmetic number, because the mean of its divisors is an integer number (3542320431).

Almost surely, 2^7084640861 is an apocalyptic number.

It is an amenable number.

7084640861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7084640861 is an equidigital number, since it uses as much as digits as its factorization.

7084640861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 7084640861 is about 84170.3086664175. The cubic root of 7084640861 is about 1920.6104161740.

The spelling of 7084640861 in words is "seven billion, eighty-four million, six hundred forty thousand, eight hundred sixty-one".