7681013 has 2 divisors, whose sum is σ = 7681014. Its totient is φ = 7681012.

The previous prime is 7681007. The next prime is 7681021. The reversal of 7681013 is 3101867.

7681013 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5098564 + 2582449 = 2258^2 + 1607^2 .

It is an emirp because it is prime and its reverse (3101867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7681013 - 2¹⁶ = 7615477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7681213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3840506 + 3840507.

It is an arithmetic number, because the mean of its divisors is an integer number (3840507).

Almost surely, 2^7681013 is an apocalyptic number.

It is an amenable number.

7681013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7681013 is an equidigital number, since it uses as much as digits as its factorization.

7681013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 7681013 is about 2771.4640535284. The cubic root of 7681013 is about 197.3056401235.

The spelling of 7681013 in words is "seven million, six hundred eighty-one thousand, thirteen".