161134243 has 2 divisors, whose sum is σ = 161134244. Its totient is φ = 161134242.

The previous prime is 161134241. The next prime is 161134261. The reversal of 161134243 is 342431161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161134243 - 2¹ = 161134241 is a prime.

Together with 161134241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161134241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80567121 + 80567122.

It is an arithmetic number, because the mean of its divisors is an integer number (80567122).

Almost surely, 2^161134243 is an apocalyptic number.

161134243 is a deficient number, since it is larger than the sum of its proper divisors (1).

161134243 is an equidigital number, since it uses as much as digits as its factorization.

161134243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 161134243 is about 12693.8663534795. The cubic root of 161134243 is about 544.1633410078.

The spelling of 161134243 in words is "one hundred sixty-one million, one hundred thirty-four thousand, two hundred forty-three".