7687013 has 2 divisors, whose sum is σ = 7687014. Its totient is φ = 7687012.

The previous prime is 7687003. The next prime is 7687021. The reversal of 7687013 is 3107867.

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., 7409284 + 277729 = 2722^2 + 527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7687013 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 (7687003) 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, 3843506 + 3843507.

It is an arithmetic number, because the mean of its divisors is an integer number (3843507).

Almost surely, 2^7687013 is an apocalyptic number.

It is an amenable number.

7687013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7687013 is an equidigital number, since it uses as much as digits as its factorization.

7687013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 7687013 is about 2772.5463025890. The cubic root of 7687013 is about 197.3570016529.

The spelling of 7687013 in words is "seven million, six hundred eighty-seven thousand, thirteen".