123707321 has 4 divisors (see below), whose sum is σ = 123788532. Its totient is φ = 123626112.

The previous prime is 123707293. The next prime is 123707327.

123707321 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55875625 + 67831696 = 7475^2 + 8236^2 .

It is a cyclic number.

It is not a de Polignac number, because 123707321 - 2⁶ = 123707257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123707327) 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, 38276 + ... + 41381.

It is an arithmetic number, because the mean of its divisors is an integer number (30947133).

Almost surely, 2^123707321 is an apocalyptic number.

It is an amenable number.

123707321 is a deficient number, since it is larger than the sum of its proper divisors (81211).

123707321 is an equidigital number, since it uses as much as digits as its factorization.

123707321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81210.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 123707321 is about 11122.3792868253. The cubic root of 123707321 is about 498.2704522272.

It can be divided in two parts, 12370 and 7321, that added together give a palindrome (19691).

The spelling of 123707321 in words is "one hundred twenty-three million, seven hundred seven thousand, three hundred twenty-one".