855687319 has 2 divisors, whose sum is σ = 855687320. Its totient is φ = 855687318.

The previous prime is 855687277. The next prime is 855687323. The reversal of 855687319 is 913786558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855687319 - 2⁹ = 855686807 is a prime.

It is a super-2 number, since 2×855687319² = 1464401575794815522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855687379) 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, 427843659 + 427843660.

It is an arithmetic number, because the mean of its divisors is an integer number (427843660).

Almost surely, 2^855687319 is an apocalyptic number.

855687319 is a deficient number, since it is larger than the sum of its proper divisors (1).

855687319 is an equidigital number, since it uses as much as digits as its factorization.

855687319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 52.

The square root of 855687319 is about 29252.1335803049. The cubic root of 855687319 is about 949.3762550057.

The spelling of 855687319 in words is "eight hundred fifty-five million, six hundred eighty-seven thousand, three hundred nineteen".