2687851 has 2 divisors, whose sum is σ = 2687852. Its totient is φ = 2687850.

The previous prime is 2687827. The next prime is 2687857. The reversal of 2687851 is 1587862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2687851 - 2⁷ = 2687723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2687851.

It is not a weakly prime, because it can be changed into another prime (2687857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343925 + 1343926.

It is an arithmetic number, because the mean of its divisors is an integer number (1343926).

2^2687851 is an apocalyptic number.

2687851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2687851 is an equidigital number, since it uses as much as digits as its factorization.

2687851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 2687851 is about 1639.4666815767. The cubic root of 2687851 is about 139.0384966608.

The spelling of 2687851 in words is "two million, six hundred eighty-seven thousand, eight hundred fifty-one".