7087813 has 2 divisors, whose sum is σ = 7087814. Its totient is φ = 7087812.

The previous prime is 7087807. The next prime is 7087853. The reversal of 7087813 is 3187807.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4153444 + 2934369 = 2038^2 + 1713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7087813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7087853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3543906 + 3543907.

It is an arithmetic number, because the mean of its divisors is an integer number (3543907).

Almost surely, 2^7087813 is an apocalyptic number.

It is an amenable number.

7087813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7087813 is an equidigital number, since it uses as much as digits as its factorization.

7087813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 7087813 is about 2662.2946869195. The cubic root of 7087813 is about 192.0897023698.

The spelling of 7087813 in words is "seven million, eighty-seven thousand, eight hundred thirteen".