161596243 has 2 divisors, whose sum is σ = 161596244. Its totient is φ = 161596242.

The previous prime is 161596241. The next prime is 161596261. The reversal of 161596243 is 342695161.

It is a weak prime.

It is an emirp because it is prime and its reverse (342695161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161596243 - 2¹ = 161596241 is a prime.

It is a super-2 number, since 2×161596243² = 52226691503430098, which contains 22 as substring.

Together with 161596241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161596241) 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, 80798121 + 80798122.

It is an arithmetic number, because the mean of its divisors is an integer number (80798122).

Almost surely, 2^161596243 is an apocalyptic number.

161596243 is a deficient number, since it is larger than the sum of its proper divisors (1).

161596243 is an equidigital number, since it uses as much as digits as its factorization.

161596243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 161596243 is about 12712.0510933523. The cubic root of 161596243 is about 544.6829151805.

The spelling of 161596243 in words is "one hundred sixty-one million, five hundred ninety-six thousand, two hundred forty-three".