161668141 has 2 divisors, whose sum is σ = 161668142. Its totient is φ = 161668140.

The previous prime is 161668121. The next prime is 161668151. The reversal of 161668141 is 141866161.

It is a happy number.

161668141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 39012516 = 11075^2 + 6246^2 .

It is a cyclic number.

It is not a de Polignac number, because 161668141 - 2²¹ = 159570989 is a prime.

It is a super-2 number, since 2×161668141² = 52273175628791762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161668097 and 161668106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161668121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80834070 + 80834071.

It is an arithmetic number, because the mean of its divisors is an integer number (80834071).

Almost surely, 2^161668141 is an apocalyptic number.

It is an amenable number.

161668141 is a deficient number, since it is larger than the sum of its proper divisors (1).

161668141 is an equidigital number, since it uses as much as digits as its factorization.

161668141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 161668141 is about 12714.8787253359. The cubic root of 161668141 is about 544.7636839842.

The spelling of 161668141 in words is "one hundred sixty-one million, six hundred sixty-eight thousand, one hundred forty-one".