855687379 has 2 divisors, whose sum is σ = 855687380. Its totient is φ = 855687378.

The previous prime is 855687353. The next prime is 855687397. The reversal of 855687379 is 973786558.

Together with next prime (855687397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855687379 - 2¹⁹ = 855163091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (855687319) 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, 427843689 + 427843690.

It is an arithmetic number, because the mean of its divisors is an integer number (427843690).

Almost surely, 2^855687379 is an apocalyptic number.

855687379 is a deficient number, since it is larger than the sum of its proper divisors (1).

855687379 is an equidigital number, since it uses as much as digits as its factorization.

855687379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12700800, while the sum is 58.

The square root of 855687379 is about 29252.1346058711. The cubic root of 855687379 is about 949.3762771955.

The spelling of 855687379 in words is "eight hundred fifty-five million, six hundred eighty-seven thousand, three hundred seventy-nine".