161736923 has 8 divisors (see below), whose sum is σ = 166952016. Its totient is φ = 156582400.

The previous prime is 161736907. The next prime is 161736931. The reversal of 161736923 is 329637161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161736923 - 2⁴ = 161736907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161726923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9686 + ... + 20427.

It is an arithmetic number, because the mean of its divisors is an integer number (20869002).

Almost surely, 2^161736923 is an apocalyptic number.

161736923 is a deficient number, since it is larger than the sum of its proper divisors (5215093).

161736923 is a wasteful number, since it uses less digits than its factorization.

161736923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30285.

The product of its digits is 40824, while the sum is 38.

The square root of 161736923 is about 12717.5832216660. The cubic root of 161736923 is about 544.8409299253.

The spelling of 161736923 in words is "one hundred sixty-one million, seven hundred thirty-six thousand, nine hundred twenty-three".