7087681 has 2 divisors, whose sum is σ = 7087682. Its totient is φ = 7087680.

The previous prime is 7087669. The next prime is 7087697. The reversal of 7087681 is 1867807.

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., 5683456 + 1404225 = 2384^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 7087681 - 2¹³ = 7079489 is a prime.

It is a super-2 number, since 2×7087681² = 100470443915522, which contains 22 as substring.

7087681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7087681.

It is not a weakly prime, because it can be changed into another prime (7087601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3543840 + 3543841.

It is an arithmetic number, because the mean of its divisors is an integer number (3543841).

Almost surely, 2^7087681 is an apocalyptic number.

It is an amenable number.

7087681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7087681 is an equidigital number, since it uses as much as digits as its factorization.

7087681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 7087681 is about 2662.2698961600. The cubic root of 7087681 is about 192.0885099005.

The spelling of 7087681 in words is "seven million, eighty-seven thousand, six hundred eighty-one".