161286323 has 4 divisors (see below), whose sum is σ = 175948728. Its totient is φ = 146623920.

The previous prime is 161286289. The next prime is 161286329. The reversal of 161286323 is 323682161.

Added to its reverse (323682161) it gives a square (484968484 = 22022²).

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161286323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161286323.

It is not an unprimeable number, because it can be changed into a prime (161286329) 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 in 3 ways as a sum of consecutive naturals, for example, 7331186 + ... + 7331207.

It is an arithmetic number, because the mean of its divisors is an integer number (43987182).

Almost surely, 2^161286323 is an apocalyptic number.

161286323 is a deficient number, since it is larger than the sum of its proper divisors (14662405).

161286323 is a wasteful number, since it uses less digits than its factorization.

161286323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14662404.

The product of its digits is 10368, while the sum is 32.

The square root of 161286323 is about 12699.8552353954. The cubic root of 161286323 is about 544.3344826546.

Adding to 161286323 its reverse (323682161), we get a square (484968484 = 22022²).

The spelling of 161286323 in words is "one hundred sixty-one million, two hundred eighty-six thousand, three hundred twenty-three".