161824673 has 2 divisors, whose sum is σ = 161824674. Its totient is φ = 161824672.

The previous prime is 161824667. The next prime is 161824687. The reversal of 161824673 is 376428161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161620369 + 204304 = 12713^2 + 452^2 .

It is a cyclic number.

It is not a de Polignac number, because 161824673 - 2¹⁶ = 161759137 is a prime.

It is not a weakly prime, because it can be changed into another prime (161824603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80912336 + 80912337.

It is an arithmetic number, because the mean of its divisors is an integer number (80912337).

Almost surely, 2^161824673 is an apocalyptic number.

It is an amenable number.

161824673 is a deficient number, since it is larger than the sum of its proper divisors (1).

161824673 is an equidigital number, since it uses as much as digits as its factorization.

161824673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 161824673 is about 12721.0327017896. The cubic root of 161824673 is about 544.9394461802.

The spelling of 161824673 in words is "one hundred sixty-one million, eight hundred twenty-four thousand, six hundred seventy-three".