855259193 has 2 divisors, whose sum is σ = 855259194. Its totient is φ = 855259192.

The previous prime is 855259183. The next prime is 855259199. The reversal of 855259193 is 391952558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824378944 + 30880249 = 28712^2 + 5557^2 .

It is a cyclic number.

It is not a de Polignac number, because 855259193 - 2⁴ = 855259177 is a prime.

It is a super-2 number, since 2×855259193² = 1462936574422022498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (855259199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427629596 + 427629597.

It is an arithmetic number, because the mean of its divisors is an integer number (427629597).

Almost surely, 2^855259193 is an apocalyptic number.

It is an amenable number.

855259193 is a deficient number, since it is larger than the sum of its proper divisors (1).

855259193 is an equidigital number, since it uses as much as digits as its factorization.

855259193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 47.

The square root of 855259193 is about 29244.8148053634. The cubic root of 855259193 is about 949.2178947982.

The spelling of 855259193 in words is "eight hundred fifty-five million, two hundred fifty-nine thousand, one hundred ninety-three".