2687081 has 2 divisors, whose sum is σ = 2687082. Its totient is φ = 2687080.

The previous prime is 2687063. The next prime is 2687093. The reversal of 2687081 is 1807862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2611456 + 75625 = 1616^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2687081 - 2¹⁸ = 2424937 is a prime.

It is a super-2 number, since 2×2687081² = 14440808601122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₁₉₅₇₅₅ and since 2687081 and 195755 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2687281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343540 + 1343541.

It is an arithmetic number, because the mean of its divisors is an integer number (1343541).

2^2687081 is an apocalyptic number.

It is an amenable number.

2687081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2687081 is an equidigital number, since it uses as much as digits as its factorization.

2687081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 2687081 is about 1639.2318322922. The cubic root of 2687081 is about 139.0252184115.

The spelling of 2687081 in words is "two million, six hundred eighty-seven thousand, eighty-one".