207171161 has 2 divisors, whose sum is σ = 207171162. Its totient is φ = 207171160.

The previous prime is 207171121. The next prime is 207171187. The reversal of 207171161 is 161171702.

207171161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (207171187) can be obtained adding 207171161 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147015625 + 60155536 = 12125^2 + 7756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207171161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 207171161.

It is not a weakly prime, because it can be changed into another prime (207171121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103585580 + 103585581.

It is an arithmetic number, because the mean of its divisors is an integer number (103585581).

Almost surely, 2^207171161 is an apocalyptic number.

It is an amenable number.

207171161 is a deficient number, since it is larger than the sum of its proper divisors (1).

207171161 is an equidigital number, since it uses as much as digits as its factorization.

207171161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 207171161 is about 14393.4415967829. The cubic root of 207171161 is about 591.7111684925.

The spelling of 207171161 in words is "two hundred seven million, one hundred seventy-one thousand, one hundred sixty-one".