123009513 has 16 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 73286480.

The previous prime is 123009511. The next prime is 123009529. The reversal of 123009513 is 315900321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123009513 - 2¹ = 123009511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123009511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29643 + ... + 33536.

It is an arithmetic number, because the mean of its divisors is an integer number (11372400).

Almost surely, 2^123009513 is an apocalyptic number.

It is an amenable number.

123009513 is a deficient number, since it is larger than the sum of its proper divisors (58948887).

123009513 is a wasteful number, since it uses less digits than its factorization.

123009513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63252.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 123009513 is about 11090.9653772789. The cubic root of 123009513 is about 497.3318041223.

Adding to 123009513 its reverse (315900321), we get a palindrome (438909834).

The spelling of 123009513 in words is "one hundred twenty-three million, nine thousand, five hundred thirteen".