170078197 has 2 divisors, whose sum is σ = 170078198. Its totient is φ = 170078196.

The previous prime is 170078143. The next prime is 170078213. The reversal of 170078197 is 791870071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116510436 + 53567761 = 10794^2 + 7319^2 .

It is an emirp because it is prime and its reverse (791870071) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170078197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170078107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85039098 + 85039099.

It is an arithmetic number, because the mean of its divisors is an integer number (85039099).

Almost surely, 2^170078197 is an apocalyptic number.

It is an amenable number.

170078197 is a deficient number, since it is larger than the sum of its proper divisors (1).

170078197 is an equidigital number, since it uses as much as digits as its factorization.

170078197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 170078197 is about 13041.4031837069. The cubic root of 170078197 is about 554.0507508234.

It can be divided in two parts, 1700 and 78197, that added together give a palindrome (79897).

The spelling of 170078197 in words is "one hundred seventy million, seventy-eight thousand, one hundred ninety-seven".