8694620681 has 2 divisors, whose sum is σ = 8694620682. Its totient is φ = 8694620680.

The previous prime is 8694620657. The next prime is 8694620687. The reversal of 8694620681 is 1860264968.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6998828281 + 1695792400 = 83659^2 + 41180^2 .

It is a cyclic number.

It is not a de Polignac number, because 8694620681 - 2¹⁰ = 8694619657 is a prime.

It is a super-2 number, since 2×8694620681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8694620687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4347310340 + 4347310341.

It is an arithmetic number, because the mean of its divisors is an integer number (4347310341).

Almost surely, 2^8694620681 is an apocalyptic number.

It is an amenable number.

8694620681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8694620681 is an equidigital number, since it uses as much as digits as its factorization.

8694620681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 8694620681 is about 93244.9498954233. The cubic root of 8694620681 is about 2056.2861322648.

The spelling of 8694620681 in words is "eight billion, six hundred ninety-four million, six hundred twenty thousand, six hundred eighty-one".