161365073 has 2 divisors, whose sum is σ = 161365074. Its totient is φ = 161365072.

The previous prime is 161365051. The next prime is 161365097. The reversal of 161365073 is 370563161.

161365073 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., 155950144 + 5414929 = 12488^2 + 2327^2 .

It is a cyclic number.

It is not a de Polignac number, because 161365073 - 2¹⁴ = 161348689 is a prime.

It is not a weakly prime, because it can be changed into another prime (161361073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80682536 + 80682537.

It is an arithmetic number, because the mean of its divisors is an integer number (80682537).

Almost surely, 2^161365073 is an apocalyptic number.

It is an amenable number.

161365073 is a deficient number, since it is larger than the sum of its proper divisors (1).

161365073 is an equidigital number, since it uses as much as digits as its factorization.

161365073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 161365073 is about 12702.9552860742. The cubic root of 161365073 is about 544.4230608736.

The spelling of 161365073 in words is "one hundred sixty-one million, three hundred sixty-five thousand, seventy-three".