161241823 has 2 divisors, whose sum is σ = 161241824. Its totient is φ = 161241822.

The previous prime is 161241803. The next prime is 161241833. The reversal of 161241823 is 328142161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161241823 - 2⁵ = 161241791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161241791 and 161241800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161241803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80620911 + 80620912.

It is an arithmetic number, because the mean of its divisors is an integer number (80620912).

Almost surely, 2^161241823 is an apocalyptic number.

161241823 is a deficient number, since it is larger than the sum of its proper divisors (1).

161241823 is an equidigital number, since it uses as much as digits as its factorization.

161241823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 161241823 is about 12698.1031260578. The cubic root of 161241823 is about 544.2844161804.

Adding to 161241823 its reverse (328142161), we get a palindrome (489383984).

The spelling of 161241823 in words is "one hundred sixty-one million, two hundred forty-one thousand, eight hundred twenty-three".