161723104 has 24 divisors (see below), whose sum is σ = 318947328. Its totient is φ = 80720640.

The previous prime is 161723077. The next prime is 161723113. The reversal of 161723104 is 401327161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15649 + ... + 23839.

It is an arithmetic number, because the mean of its divisors is an integer number (13289472).

Almost surely, 2^161723104 is an apocalyptic number.

It is an amenable number.

161723104 is a deficient number, since it is larger than the sum of its proper divisors (157224224).

161723104 is an equidigital number, since it uses as much as digits as its factorization.

161723104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8818 (or 8810 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 161723104 is about 12717.0399071482. The cubic root of 161723104 is about 544.8254121921.

The spelling of 161723104 in words is "one hundred sixty-one million, seven hundred twenty-three thousand, one hundred four".