850030346821 has 2 divisors, whose sum is σ = 850030346822. Its totient is φ = 850030346820.

The previous prime is 850030346813. The next prime is 850030346831. The reversal of 850030346821 is 128643030058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439322398596 + 410707948225 = 662814^2 + 640865^2 .

It is a cyclic number.

It is not a de Polignac number, because 850030346821 - 2³ = 850030346813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (850030346831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425015173410 + 425015173411.

It is an arithmetic number, because the mean of its divisors is an integer number (425015173411).

Almost surely, 2^850030346821 is an apocalyptic number.

It is an amenable number.

850030346821 is a deficient number, since it is larger than the sum of its proper divisors (1).

850030346821 is an equidigital number, since it uses as much as digits as its factorization.

850030346821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

Adding to 850030346821 its reverse (128643030058), we get a palindrome (978673376879).

The spelling of 850030346821 in words is "eight hundred fifty billion, thirty million, three hundred forty-six thousand, eight hundred twenty-one".