159723 has 6 divisors (see below), whose sum is σ = 230724. Its totient is φ = 106476.

The previous prime is 159721. The next prime is 159737. The reversal of 159723 is 327951.

It is not a de Polignac number, because 159723 - 2¹ = 159721 is a prime.

It is a super-2 number, since 2×159723² = 51022873458, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 5 + 7⁴ + 9⁴ + 2¹⁷ + 3⁹ .

It is a plaindrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 159723.

It is not an unprimeable number, because it can be changed into a prime (159721) 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 5 ways as a sum of consecutive naturals, for example, 8865 + ... + 8882.

It is an arithmetic number, because the mean of its divisors is an integer number (38454).

2¹⁵⁹⁷²³ is an apocalyptic number.

159723 is a deficient number, since it is larger than the sum of its proper divisors (71001).

159723 is a wasteful number, since it uses less digits than its factorization.

159723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17753 (or 17750 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 159723 is about 399.6536000088. The cubic root of 159723 is about 54.2570053318.

The spelling of 159723 in words is "one hundred fifty-nine thousand, seven hundred twenty-three".