161723492 has 12 divisors (see below), whose sum is σ = 323447040. Its totient is φ = 69310056.

The previous prime is 161723491. The next prime is 161723509. The reversal of 161723492 is 294327161.

161723492 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (161723491) by changing a digit.

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, 2887892 + ... + 2887947.

It is an arithmetic number, because the mean of its divisors is an integer number (26953920).

Almost surely, 2^161723492 is an apocalyptic number.

It is an amenable number.

161723492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161723492 is a wasteful number, since it uses less digits than its factorization.

161723492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775850 (or 5775848 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 161723492 is about 12717.0551622614. The cubic root of 161723492 is about 544.8258478999.

The spelling of 161723492 in words is "one hundred sixty-one million, seven hundred twenty-three thousand, four hundred ninety-two".