161365343 has 4 divisors (see below), whose sum is σ = 170857440. Its totient is φ = 151873248.

The previous prime is 161365339. The next prime is 161365427. The reversal of 161365343 is 343563161.

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 161365343 - 2² = 161365339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161365543) 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, 4746023 + ... + 4746056.

It is an arithmetic number, because the mean of its divisors is an integer number (42714360).

Almost surely, 2^161365343 is an apocalyptic number.

161365343 is a deficient number, since it is larger than the sum of its proper divisors (9492097).

161365343 is an equidigital number, since it uses as much as digits as its factorization.

161365343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9492096.

The product of its digits is 19440, while the sum is 32.

The square root of 161365343 is about 12702.9659135180. The cubic root of 161365343 is about 544.4233645208.

The spelling of 161365343 in words is "one hundred sixty-one million, three hundred sixty-five thousand, three hundred forty-three".