7868851 has 2 divisors, whose sum is σ = 7868852. Its totient is φ = 7868850.

The previous prime is 7868849. The next prime is 7868897. The reversal of 7868851 is 1588687.

7868851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1588687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7868851 - 2¹ = 7868849 is a prime.

Together with 7868849, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 7868798 and 7868807.

It is not a weakly prime, because it can be changed into another prime (7868801) 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, 3934425 + 3934426.

It is an arithmetic number, because the mean of its divisors is an integer number (3934426).

Almost surely, 2^7868851 is an apocalyptic number.

7868851 is the 1255-th centered decagonal number.

7868851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868851 is an equidigital number, since it uses as much as digits as its factorization.

7868851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 43.

The square root of 7868851 is about 2805.1472332125. The cubic root of 7868851 is about 198.9010644292.

The spelling of 7868851 in words is "seven million, eight hundred sixty-eight thousand, eight hundred fifty-one".