854685197 has 2 divisors, whose sum is σ = 854685198. Its totient is φ = 854685196.

The previous prime is 854685179. The next prime is 854685263. The reversal of 854685197 is 791586458.

Together with previous prime (854685179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760711561 + 93973636 = 27581^2 + 9694^2 .

It is a cyclic number.

It is not a de Polignac number, because 854685197 - 2⁶ = 854685133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854681197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427342598 + 427342599.

It is an arithmetic number, because the mean of its divisors is an integer number (427342599).

Almost surely, 2^854685197 is an apocalyptic number.

It is an amenable number.

854685197 is a deficient number, since it is larger than the sum of its proper divisors (1).

854685197 is an equidigital number, since it uses as much as digits as its factorization.

854685197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 53.

The square root of 854685197 is about 29234.9995211219. Note that the first 3 decimals coincide. The cubic root of 854685197 is about 949.0054955576.

The spelling of 854685197 in words is "eight hundred fifty-four million, six hundred eighty-five thousand, one hundred ninety-seven".