172170697 has 2 divisors, whose sum is σ = 172170698. Its totient is φ = 172170696.

The previous prime is 172170671. The next prime is 172170701. The reversal of 172170697 is 796071271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159037321 + 13133376 = 12611^2 + 3624^2 .

It is an emirp because it is prime and its reverse (796071271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172170697 - 2⁷ = 172170569 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172170797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86085348 + 86085349.

It is an arithmetic number, because the mean of its divisors is an integer number (86085349).

Almost surely, 2^172170697 is an apocalyptic number.

It is an amenable number.

172170697 is a deficient number, since it is larger than the sum of its proper divisors (1).

172170697 is an equidigital number, since it uses as much as digits as its factorization.

172170697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37044, while the sum is 40.

The square root of 172170697 is about 13121.3831969042. The cubic root of 172170697 is about 556.3136880829.

The spelling of 172170697 in words is "one hundred seventy-two million, one hundred seventy thousand, six hundred ninety-seven".