850521047 has 2 divisors, whose sum is σ = 850521048. Its totient is φ = 850521046.

The previous prime is 850521043. The next prime is 850521079. The reversal of 850521047 is 740125058.

It is an a-pointer prime, because the next prime (850521079) can be obtained adding 850521047 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 850521047 - 2² = 850521043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (850521041) 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, 425260523 + 425260524.

It is an arithmetic number, because the mean of its divisors is an integer number (425260524).

Almost surely, 2^850521047 is an apocalyptic number.

850521047 is a deficient number, since it is larger than the sum of its proper divisors (1).

850521047 is an equidigital number, since it uses as much as digits as its factorization.

850521047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 850521047 is about 29163.6939875593. The cubic root of 850521047 is about 947.4617550114.

The spelling of 850521047 in words is "eight hundred fifty million, five hundred twenty-one thousand, forty-seven".