7628681 has 2 divisors, whose sum is σ = 7628682. Its totient is φ = 7628680.

The previous prime is 7628659. The next prime is 7628689. The reversal of 7628681 is 1868267.

7628681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 115600 = 2741^2 + 340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7628681 is a prime.

It is a super-2 number, since 2×7628681² = 116393547599522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7628689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3814340 + 3814341.

It is an arithmetic number, because the mean of its divisors is an integer number (3814341).

Almost surely, 2^7628681 is an apocalyptic number.

It is an amenable number.

7628681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7628681 is an equidigital number, since it uses as much as digits as its factorization.

7628681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 7628681 is about 2762.0066980368. The cubic root of 7628681 is about 196.8565267289.

It can be divided in two parts, 76286 and 81, that added together give a palindrome (76367).

The spelling of 7628681 in words is "seven million, six hundred twenty-eight thousand, six hundred eighty-one".