130723 has 4 divisors (see below), whose sum is σ = 132928. Its totient is φ = 128520.

The previous prime is 130699. The next prime is 130729. The reversal of 130723 is 327031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327031 = 157 ⋅2083.

It is a cyclic number.

It is not a de Polignac number, because 130723 - 2⁹ = 130211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130697 and 130706.

It is not an unprimeable number, because it can be changed into a prime (130729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (33232).

2¹³⁰⁷²³ is an apocalyptic number.

130723 is a deficient number, since it is larger than the sum of its proper divisors (2205).

130723 is an equidigital number, since it uses as much as digits as its factorization.

130723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 130723 is about 361.5563579859. The cubic root of 130723 is about 50.7517087116.

Adding to 130723 its reverse (327031), we get a palindrome (457754).

The spelling of 130723 in words is "one hundred thirty thousand, seven hundred twenty-three".