856467197 has 2 divisors, whose sum is σ = 856467198. Its totient is φ = 856467196.

The previous prime is 856467181. The next prime is 856467251. The reversal of 856467197 is 791764658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432889636 + 423577561 = 20806^2 + 20581^2 .

It is a cyclic number.

It is not a de Polignac number, because 856467197 - 2⁴ = 856467181 is a prime.

It is a super-3 number, since 3×856467197³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856467137) 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, 428233598 + 428233599.

It is an arithmetic number, because the mean of its divisors is an integer number (428233599).

Almost surely, 2^856467197 is an apocalyptic number.

It is an amenable number.

856467197 is a deficient number, since it is larger than the sum of its proper divisors (1).

856467197 is an equidigital number, since it uses as much as digits as its factorization.

856467197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The square root of 856467197 is about 29265.4608198812. The cubic root of 856467197 is about 949.6645896260.

The spelling of 856467197 in words is "eight hundred fifty-six million, four hundred sixty-seven thousand, one hundred ninety-seven".