851310197 has 2 divisors, whose sum is σ = 851310198. Its totient is φ = 851310196.

The previous prime is 851310169. The next prime is 851310211. The reversal of 851310197 is 791013158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543869041 + 307441156 = 23321^2 + 17534^2 .

It is a cyclic number.

It is not a de Polignac number, because 851310197 - 2¹⁴ = 851293813 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 (851310137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425655098 + 425655099.

It is an arithmetic number, because the mean of its divisors is an integer number (425655099).

Almost surely, 2^851310197 is an apocalyptic number.

It is an amenable number.

851310197 is a deficient number, since it is larger than the sum of its proper divisors (1).

851310197 is an equidigital number, since it uses as much as digits as its factorization.

851310197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 851310197 is about 29177.2205153267. The cubic root of 851310197 is about 947.7546963480.

The spelling of 851310197 in words is "eight hundred fifty-one million, three hundred ten thousand, one hundred ninety-seven".