161716723 has 8 divisors (see below), whose sum is σ = 184898048. Its totient is φ = 138555144.

The previous prime is 161716717. The next prime is 161716729. The reversal of 161716723 is 327617161.

It is an interprime number because it is at equal distance from previous prime (161716717) and next prime (161716729).

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

It is not a de Polignac number, because 161716723 - 2⁵ = 161716691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161716729) 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, 23740 + ... + 29782.

It is an arithmetic number, because the mean of its divisors is an integer number (23112256).

Almost surely, 2^161716723 is an apocalyptic number.

161716723 is a deficient number, since it is larger than the sum of its proper divisors (23181325).

161716723 is an equidigital number, since it uses as much as digits as its factorization.

161716723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9873.

The product of its digits is 10584, while the sum is 34.

The square root of 161716723 is about 12716.7890208181. The cubic root of 161716723 is about 544.8182464942.

The spelling of 161716723 in words is "one hundred sixty-one million, seven hundred sixteen thousand, seven hundred twenty-three".