161170201 has 2 divisors, whose sum is σ = 161170202. Its totient is φ = 161170200.

The previous prime is 161170181. The next prime is 161170249. The reversal of 161170201 is 102071161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141633801 + 19536400 = 11901^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 161170201 - 2⁵ = 161170169 is a prime.

It is not a weakly prime, because it can be changed into another prime (161170291) 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, 80585100 + 80585101.

It is an arithmetic number, because the mean of its divisors is an integer number (80585101).

Almost surely, 2^161170201 is an apocalyptic number.

It is an amenable number.

161170201 is a deficient number, since it is larger than the sum of its proper divisors (1).

161170201 is an equidigital number, since it uses as much as digits as its factorization.

161170201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 161170201 is about 12695.2826278110. The cubic root of 161170201 is about 544.2038156864.

The spelling of 161170201 in words is "one hundred sixty-one million, one hundred seventy thousand, two hundred one".