855015047 has 2 divisors, whose sum is σ = 855015048. Its totient is φ = 855015046.

The previous prime is 855015019. The next prime is 855015059. The reversal of 855015047 is 740510558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855015047 - 2⁸ = 855014791 is a prime.

It is equal to p_43825760 and since 855015047 and 43825760 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 855014998 and 855015016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855015097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427507523 + 427507524.

It is an arithmetic number, because the mean of its divisors is an integer number (427507524).

Almost surely, 2^855015047 is an apocalyptic number.

855015047 is a deficient number, since it is larger than the sum of its proper divisors (1).

855015047 is an equidigital number, since it uses as much as digits as its factorization.

855015047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 855015047 is about 29240.6403315659. The cubic root of 855015047 is about 949.1275635826.

The spelling of 855015047 in words is "eight hundred fifty-five million, fifteen thousand, forty-seven".