7981013 has 2 divisors, whose sum is σ = 7981014. Its totient is φ = 7981012.

The previous prime is 7980997. The next prime is 7981021. The reversal of 7981013 is 3101897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6360484 + 1620529 = 2522^2 + 1273^2 .

It is an emirp because it is prime and its reverse (3101897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7981013 - 2⁴ = 7980997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7981033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990506 + 3990507.

It is an arithmetic number, because the mean of its divisors is an integer number (3990507).

Almost surely, 2^7981013 is an apocalyptic number.

It is an amenable number.

7981013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7981013 is an equidigital number, since it uses as much as digits as its factorization.

7981013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 7981013 is about 2825.0686717317. The cubic root of 7981013 is about 199.8416496589.

The spelling of 7981013 in words is "seven million, nine hundred eighty-one thousand, thirteen".