123136313 has 2 divisors, whose sum is σ = 123136314. Its totient is φ = 123136312.

The previous prime is 123136297. The next prime is 123136339. The reversal of 123136313 is 313631321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91910569 + 31225744 = 9587^2 + 5588^2 .

It is a cyclic number.

It is not a de Polignac number, because 123136313 - 2⁴ = 123136297 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123136913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61568156 + 61568157.

It is an arithmetic number, because the mean of its divisors is an integer number (61568157).

Almost surely, 2^123136313 is an apocalyptic number.

It is an amenable number.

123136313 is a deficient number, since it is larger than the sum of its proper divisors (1).

123136313 is an equidigital number, since it uses as much as digits as its factorization.

123136313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

The square root of 123136313 is about 11096.6802693418. The cubic root of 123136313 is about 497.5026310644.

Adding to 123136313 its reverse (313631321), we get a palindrome (436767634).

The spelling of 123136313 in words is "one hundred twenty-three million, one hundred thirty-six thousand, three hundred thirteen".