161671177 has 2 divisors, whose sum is σ = 161671178. Its totient is φ = 161671176.

The previous prime is 161671141. The next prime is 161671183. The reversal of 161671177 is 771176161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116122176 + 45549001 = 10776^2 + 6749^2 .

It is a cyclic number.

It is not a de Polignac number, because 161671177 - 2¹⁵ = 161638409 is a prime.

It is a super-2 number, since 2×161671177² = 52275138945130658, which contains 22 as substring.

It is equal to p_9062893 and since 161671177 and 9062893 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (161671187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80835588 + 80835589.

It is an arithmetic number, because the mean of its divisors is an integer number (80835589).

Almost surely, 2^161671177 is an apocalyptic number.

It is an amenable number.

161671177 is a deficient number, since it is larger than the sum of its proper divisors (1).

161671177 is an equidigital number, since it uses as much as digits as its factorization.

161671177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12348, while the sum is 37.

The square root of 161671177 is about 12714.9981124655. The cubic root of 161671177 is about 544.7670940401.

The spelling of 161671177 in words is "one hundred sixty-one million, six hundred seventy-one thousand, one hundred seventy-seven".