855008783 has 2 divisors, whose sum is σ = 855008784. Its totient is φ = 855008782.

The previous prime is 855008741. The next prime is 855008789. The reversal of 855008783 is 387800558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855008783 - 2⁶ = 855008719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855008789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427504391 + 427504392.

It is an arithmetic number, because the mean of its divisors is an integer number (427504392).

Almost surely, 2^855008783 is an apocalyptic number.

855008783 is a deficient number, since it is larger than the sum of its proper divisors (1).

855008783 is an equidigital number, since it uses as much as digits as its factorization.

855008783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 855008783 is about 29240.5332201723. The cubic root of 855008783 is about 949.1252457483.

Subtracting from 855008783 its reverse (387800558), we obtain a square (467208225 = 21615²).

The spelling of 855008783 in words is "eight hundred fifty-five million, eight thousand, seven hundred eighty-three".