161065313 has 2 divisors, whose sum is σ = 161065314. Its totient is φ = 161065312.

The previous prime is 161065213. The next prime is 161065319. The reversal of 161065313 is 313560161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133102369 + 27962944 = 11537^2 + 5288^2 .

It is a cyclic number.

It is not a de Polignac number, because 161065313 - 2¹² = 161061217 is a prime.

It is not a weakly prime, because it can be changed into another prime (161065319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80532656 + 80532657.

It is an arithmetic number, because the mean of its divisors is an integer number (80532657).

Almost surely, 2^161065313 is an apocalyptic number.

It is an amenable number.

161065313 is a deficient number, since it is larger than the sum of its proper divisors (1).

161065313 is an equidigital number, since it uses as much as digits as its factorization.

161065313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 161065313 is about 12691.1509722326. The cubic root of 161065313 is about 544.0857358833.

The spelling of 161065313 in words is "one hundred sixty-one million, sixty-five thousand, three hundred thirteen".