123713 has 4 divisors (see below), whose sum is σ = 124548. Its totient is φ = 122880.

The previous prime is 123707. The next prime is 123719. The reversal of 123713 is 317321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (123707) and next prime (123719).

It can be written as a sum of positive squares in 2 ways, for example, as 73984 + 49729 = 272^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 123713 - 2⁸ = 123457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123691 and 123700.

It is not an unprimeable number, because it can be changed into a prime (123719) 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, 128 + ... + 513.

It is an arithmetic number, because the mean of its divisors is an integer number (31137).

2¹²³⁷¹³ is an apocalyptic number.

It is an amenable number.

123713 is a deficient number, since it is larger than the sum of its proper divisors (835).

123713 is an equidigital number, since it uses as much as digits as its factorization.

123713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its digits is 126, while the sum is 17.

The square root of 123713 is about 351.7285885452. The cubic root of 123713 is about 49.8278076768.

The spelling of 123713 in words is "one hundred twenty-three thousand, seven hundred thirteen".