161244911 has 2 divisors, whose sum is σ = 161244912. Its totient is φ = 161244910.

The previous prime is 161244871. The next prime is 161244913. The reversal of 161244911 is 119442161.

It is a strong prime.

It is an emirp because it is prime and its reverse (119442161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161244911 is a prime.

It is a Sophie Germain prime.

Together with 161244913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161244913) 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, 80622455 + 80622456.

It is an arithmetic number, because the mean of its divisors is an integer number (80622456).

Almost surely, 2^161244911 is an apocalyptic number.

161244911 is a deficient number, since it is larger than the sum of its proper divisors (1).

161244911 is an equidigital number, since it uses as much as digits as its factorization.

161244911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 161244911 is about 12698.2247184400. The cubic root of 161244911 is about 544.2878907536.

The spelling of 161244911 in words is "one hundred sixty-one million, two hundred forty-four thousand, nine hundred eleven".