855610247 has 2 divisors, whose sum is σ = 855610248. Its totient is φ = 855610246.

The previous prime is 855610207. The next prime is 855610267. The reversal of 855610247 is 742016558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855610247 - 2¹² = 855606151 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855610247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855610207) 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, 427805123 + 427805124.

It is an arithmetic number, because the mean of its divisors is an integer number (427805124).

Almost surely, 2^855610247 is an apocalyptic number.

855610247 is a deficient number, since it is larger than the sum of its proper divisors (1).

855610247 is an equidigital number, since it uses as much as digits as its factorization.

855610247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 855610247 is about 29250.8161766471. The cubic root of 855610247 is about 949.3477506202.

The spelling of 855610247 in words is "eight hundred fifty-five million, six hundred ten thousand, two hundred forty-seven".