161389141 has 2 divisors, whose sum is σ = 161389142. Its totient is φ = 161389140.

The previous prime is 161389121. The next prime is 161389157. The reversal of 161389141 is 141983161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131194116 + 30195025 = 11454^2 + 5495^2 .

It is an emirp because it is prime and its reverse (141983161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161389141 - 2¹⁵ = 161356373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161389097 and 161389106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161389121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80694570 + 80694571.

It is an arithmetic number, because the mean of its divisors is an integer number (80694571).

Almost surely, 2^161389141 is an apocalyptic number.

It is an amenable number.

161389141 is a deficient number, since it is larger than the sum of its proper divisors (1).

161389141 is an equidigital number, since it uses as much as digits as its factorization.

161389141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 161389141 is about 12703.9025893621. The cubic root of 161389141 is about 544.4501268770.

The spelling of 161389141 in words is "one hundred sixty-one million, three hundred eighty-nine thousand, one hundred forty-one".