851205293 has 2 divisors, whose sum is σ = 851205294. Its totient is φ = 851205292.

The previous prime is 851205259. The next prime is 851205337. The reversal of 851205293 is 392502158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792253609 + 58951684 = 28147^2 + 7678^2 .

It is a cyclic number.

It is not a de Polignac number, because 851205293 - 2²⁶ = 784096429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851205233) 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, 425602646 + 425602647.

It is an arithmetic number, because the mean of its divisors is an integer number (425602647).

Almost surely, 2^851205293 is an apocalyptic number.

It is an amenable number.

851205293 is a deficient number, since it is larger than the sum of its proper divisors (1).

851205293 is an equidigital number, since it uses as much as digits as its factorization.

851205293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 851205293 is about 29175.4227561487. The cubic root of 851205293 is about 947.7157652419.

The spelling of 851205293 in words is "eight hundred fifty-one million, two hundred five thousand, two hundred ninety-three".