161730443 has 4 divisors (see below), whose sum is σ = 184834800. Its totient is φ = 138626088.

The previous prime is 161730427. The next prime is 161730473. The reversal of 161730443 is 344037161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161730443 - 2⁴ = 161730427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161730473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11552168 + ... + 11552181.

It is an arithmetic number, because the mean of its divisors is an integer number (46208700).

Almost surely, 2^161730443 is an apocalyptic number.

161730443 is a deficient number, since it is larger than the sum of its proper divisors (23104357).

161730443 is an equidigital number, since it uses as much as digits as its factorization.

161730443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23104356.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 161730443 is about 12717.3284537280. The cubic root of 161730443 is about 544.8336534660.

The spelling of 161730443 in words is "one hundred sixty-one million, seven hundred thirty thousand, four hundred forty-three".