161349361 has 2 divisors, whose sum is σ = 161349362. Its totient is φ = 161349360.

The previous prime is 161349323. The next prime is 161349457. The reversal of 161349361 is 163943161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155376225 + 5973136 = 12465^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 161349361 - 2¹⁷ = 161218289 is a prime.

It is not a weakly prime, because it can be changed into another prime (161344361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80674680 + 80674681.

It is an arithmetic number, because the mean of its divisors is an integer number (80674681).

Almost surely, 2^161349361 is an apocalyptic number.

It is an amenable number.

161349361 is a deficient number, since it is larger than the sum of its proper divisors (1).

161349361 is an equidigital number, since it uses as much as digits as its factorization.

161349361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 161349361 is about 12702.3368322526. The cubic root of 161349361 is about 544.4053902740.

The spelling of 161349361 in words is "one hundred sixty-one million, three hundred forty-nine thousand, three hundred sixty-one".