850521043 has 2 divisors, whose sum is σ = 850521044. Its totient is φ = 850521042.

The previous prime is 850521041. The next prime is 850521047. The reversal of 850521043 is 340125058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 850521043 - 2¹ = 850521041 is a prime.

Together with 850521041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (850521041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425260521 + 425260522.

It is an arithmetic number, because the mean of its divisors is an integer number (425260522).

Almost surely, 2^850521043 is an apocalyptic number.

850521043 is a deficient number, since it is larger than the sum of its proper divisors (1).

850521043 is an equidigital number, since it uses as much as digits as its factorization.

850521043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 850521043 is about 29163.6939189808. The cubic root of 850521043 is about 947.4617535261.

The spelling of 850521043 in words is "eight hundred fifty million, five hundred twenty-one thousand, forty-three".