161238443 has 2 divisors, whose sum is σ = 161238444. Its totient is φ = 161238442.

The previous prime is 161238439. The next prime is 161238481. The reversal of 161238443 is 344832161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161238443 - 2² = 161238439 is a prime.

It is not a weakly prime, because it can be changed into another prime (161238403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80619221 + 80619222.

It is an arithmetic number, because the mean of its divisors is an integer number (80619222).

Almost surely, 2^161238443 is an apocalyptic number.

161238443 is a deficient number, since it is larger than the sum of its proper divisors (1).

161238443 is an equidigital number, since it uses as much as digits as its factorization.

161238443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 161238443 is about 12697.9700346158. The cubic root of 161238443 is about 544.2806130022.

The spelling of 161238443 in words is "one hundred sixty-one million, two hundred thirty-eight thousand, four hundred forty-three".