855042347 has 2 divisors, whose sum is σ = 855042348. Its totient is φ = 855042346.

The previous prime is 855042329. The next prime is 855042373. The reversal of 855042347 is 743240558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855042347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855042347.

It is not a weakly prime, because it can be changed into another prime (855042317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427521173 + 427521174.

It is an arithmetic number, because the mean of its divisors is an integer number (427521174).

Almost surely, 2^855042347 is an apocalyptic number.

855042347 is a deficient number, since it is larger than the sum of its proper divisors (1).

855042347 is an equidigital number, since it uses as much as digits as its factorization.

855042347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 38.

The square root of 855042347 is about 29241.1071438822. The cubic root of 855042347 is about 949.1376651229.

The spelling of 855042347 in words is "eight hundred fifty-five million, forty-two thousand, three hundred forty-seven".