123313505 has 32 divisors (see below), whose sum is σ = 176670720. Its totient is φ = 80847360.

The previous prime is 123313501. The next prime is 123313517. The reversal of 123313505 is 505313321.

It is not a de Polignac number, because 123313505 - 2² = 123313501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123313501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95927 + ... + 97203.

It is an arithmetic number, because the mean of its divisors is an integer number (5520960).

Almost surely, 2^123313505 is an apocalyptic number.

It is an amenable number.

123313505 is a deficient number, since it is larger than the sum of its proper divisors (53357215).

123313505 is a wasteful number, since it uses less digits than its factorization.

123313505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 123313505 is about 11104.6614086158. The cubic root of 123313505 is about 497.7411505659.

Adding to 123313505 its reverse (505313321), we get a palindrome (628626826).

The spelling of 123313505 in words is "one hundred twenty-three million, three hundred thirteen thousand, five hundred five".