123305513 has 2 divisors, whose sum is σ = 123305514. Its totient is φ = 123305512.

The previous prime is 123305509. The next prime is 123305519. The reversal of 123305513 is 315503321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95511529 + 27793984 = 9773^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 123305513 - 2² = 123305509 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123305519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61652756 + 61652757.

It is an arithmetic number, because the mean of its divisors is an integer number (61652757).

Almost surely, 2^123305513 is an apocalyptic number.

It is an amenable number.

123305513 is a deficient number, since it is larger than the sum of its proper divisors (1).

123305513 is an equidigital number, since it uses as much as digits as its factorization.

123305513 is an evil number, because the sum of its binary digits is even.

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

The square root of 123305513 is about 11104.3015539024. The cubic root of 123305513 is about 497.7303973960.

Adding to 123305513 its reverse (315503321), we get a palindrome (438808834).

The spelling of 123305513 in words is "one hundred twenty-three million, three hundred five thousand, five hundred thirteen".