850623281 has 2 divisors, whose sum is σ = 850623282. Its totient is φ = 850623280.

The previous prime is 850623211. The next prime is 850623287. The reversal of 850623281 is 182326058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558896881 + 291726400 = 23641^2 + 17080^2 .

It is a cyclic number.

It is not a de Polignac number, because 850623281 - 2¹⁰ = 850622257 is a prime.

It is a super-2 number, since 2×850623281² = 1447119932358409922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (850623287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425311640 + 425311641.

It is an arithmetic number, because the mean of its divisors is an integer number (425311641).

Almost surely, 2^850623281 is an apocalyptic number.

It is an amenable number.

850623281 is a deficient number, since it is larger than the sum of its proper divisors (1).

850623281 is an equidigital number, since it uses as much as digits as its factorization.

850623281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 850623281 is about 29165.4466963906. The cubic root of 850623281 is about 947.4997156336.

The spelling of 850623281 in words is "eight hundred fifty million, six hundred twenty-three thousand, two hundred eighty-one".