123513017 has 6 divisors (see below), whose sum is σ = 124359354. Its totient is φ = 122672400.

The previous prime is 123513011. The next prime is 123513113. The reversal of 123513017 is 710315321.

It can be written as a sum of positive squares in only one way, i.e., 79370281 + 44142736 = 8909^2 + 6644^2 .

It is not a de Polignac number, because 123513017 - 2²² = 119318713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123512983 and 123513001.

It is not an unprimeable number, because it can be changed into a prime (123513011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20093 + ... + 25509.

It is an arithmetic number, because the mean of its divisors is an integer number (20726559).

Almost surely, 2^123513017 is an apocalyptic number.

It is an amenable number.

123513017 is a deficient number, since it is larger than the sum of its proper divisors (846337).

123513017 is an frugal number, since it uses more digits than its factorization.

123513017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5719 (or 5568 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 123513017 is about 11113.6410325329. The cubic root of 123513017 is about 498.0094418730.

Adding to 123513017 its reverse (710315321), we get a palindrome (833828338).

The spelling of 123513017 in words is "one hundred twenty-three million, five hundred thirteen thousand, seventeen".