856240193 has 2 divisors, whose sum is σ = 856240194. Its totient is φ = 856240192.

The previous prime is 856240183. The next prime is 856240237. The reversal of 856240193 is 391042658.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512026384 + 344213809 = 22628^2 + 18553^2 .

It is a cyclic number.

It is not a de Polignac number, because 856240193 - 2¹² = 856236097 is a prime.

It is not a weakly prime, because it can be changed into another prime (856240183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428120096 + 428120097.

It is an arithmetic number, because the mean of its divisors is an integer number (428120097).

Almost surely, 2^856240193 is an apocalyptic number.

It is an amenable number.

856240193 is a deficient number, since it is larger than the sum of its proper divisors (1).

856240193 is an equidigital number, since it uses as much as digits as its factorization.

856240193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 856240193 is about 29261.5822026083. The cubic root of 856240193 is about 949.5806803180.

The spelling of 856240193 in words is "eight hundred fifty-six million, two hundred forty thousand, one hundred ninety-three".