161773349 has 2 divisors, whose sum is σ = 161773350. Its totient is φ = 161773348.

The previous prime is 161773333. The next prime is 161773369. The reversal of 161773349 is 943377161.

161773349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158508100 + 3265249 = 12590^2 + 1807^2 .

It is an emirp because it is prime and its reverse (943377161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161773349 - 2⁴ = 161773333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161773369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80886674 + 80886675.

It is an arithmetic number, because the mean of its divisors is an integer number (80886675).

Almost surely, 2^161773349 is an apocalyptic number.

It is an amenable number.

161773349 is a deficient number, since it is larger than the sum of its proper divisors (1).

161773349 is an equidigital number, since it uses as much as digits as its factorization.

161773349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 41.

The square root of 161773349 is about 12719.0152527623. The cubic root of 161773349 is about 544.8818294420.

The spelling of 161773349 in words is "one hundred sixty-one million, seven hundred seventy-three thousand, three hundred forty-nine".