161384771 has 2 divisors, whose sum is σ = 161384772. Its totient is φ = 161384770.

The previous prime is 161384759. The next prime is 161384779. The reversal of 161384771 is 177483161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161384771 is a prime.

It is not a weakly prime, because it can be changed into another prime (161384779) 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, 80692385 + 80692386.

It is an arithmetic number, because the mean of its divisors is an integer number (80692386).

Almost surely, 2^161384771 is an apocalyptic number.

161384771 is a deficient number, since it is larger than the sum of its proper divisors (1).

161384771 is an equidigital number, since it uses as much as digits as its factorization.

161384771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 161384771 is about 12703.7305938059. The cubic root of 161384771 is about 544.4452127328.

The spelling of 161384771 in words is "one hundred sixty-one million, three hundred eighty-four thousand, seven hundred seventy-one".