161723241 has 6 divisors (see below), whose sum is σ = 233600250. Its totient is φ = 107815488.

The previous prime is 161723207. The next prime is 161723293. The reversal of 161723241 is 142327161.

161723241 is a `hidden beast` number, since 1 + 617 + 2 + 3 + 2 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159289641 + 2433600 = 12621^2 + 1560^2 .

It is not a de Polignac number, because 161723241 - 2⁷ = 161723113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161723141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8984616 + ... + 8984633.

It is an arithmetic number, because the mean of its divisors is an integer number (38933375).

Almost surely, 2^161723241 is an apocalyptic number.

It is an amenable number.

161723241 is a deficient number, since it is larger than the sum of its proper divisors (71877009).

161723241 is a wasteful number, since it uses less digits than its factorization.

161723241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17969255 (or 17969252 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 161723241 is about 12717.0452936207. The cubic root of 161723241 is about 544.8255660375.

The spelling of 161723241 in words is "one hundred sixty-one million, seven hundred twenty-three thousand, two hundred forty-one".