161330443 has 2 divisors, whose sum is σ = 161330444. Its totient is φ = 161330442.

The previous prime is 161330423. The next prime is 161330473. The reversal of 161330443 is 344033161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161330443 is a prime.

It is not a weakly prime, because it can be changed into another prime (161330423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80665221 + 80665222.

It is an arithmetic number, because the mean of its divisors is an integer number (80665222).

Almost surely, 2^161330443 is an apocalyptic number.

161330443 is a deficient number, since it is larger than the sum of its proper divisors (1).

161330443 is an equidigital number, since it uses as much as digits as its factorization.

161330443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 161330443 is about 12701.5921442944. The cubic root of 161330443 is about 544.3841125042.

The spelling of 161330443 in words is "one hundred sixty-one million, three hundred thirty thousand, four hundred forty-three".