855651047 has 2 divisors, whose sum is σ = 855651048. Its totient is φ = 855651046.

The previous prime is 855651019. The next prime is 855651079. The reversal of 855651047 is 740156558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855651047 - 2⁸ = 855650791 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 855650995 and 855651013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855651847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427825523 + 427825524.

It is an arithmetic number, because the mean of its divisors is an integer number (427825524).

Almost surely, 2^855651047 is an apocalyptic number.

855651047 is a deficient number, since it is larger than the sum of its proper divisors (1).

855651047 is an equidigital number, since it uses as much as digits as its factorization.

855651047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 855651047 is about 29251.5135847703. The cubic root of 855651047 is about 949.3628403462.

The spelling of 855651047 in words is "eight hundred fifty-five million, six hundred fifty-one thousand, forty-seven".