123756313 has 2 divisors, whose sum is σ = 123756314. Its totient is φ = 123756312.

The previous prime is 123756257. The next prime is 123756317. The reversal of 123756313 is 313657321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111450249 + 12306064 = 10557^2 + 3508^2 .

It is an emirp because it is prime and its reverse (313657321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123756313 is a prime.

It is not a weakly prime, because it can be changed into another prime (123756317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61878156 + 61878157.

It is an arithmetic number, because the mean of its divisors is an integer number (61878157).

Almost surely, 2^123756313 is an apocalyptic number.

It is an amenable number.

123756313 is a deficient number, since it is larger than the sum of its proper divisors (1).

123756313 is an equidigital number, since it uses as much as digits as its factorization.

123756313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 31.

The square root of 123756313 is about 11124.5814752736. The cubic root of 123756313 is about 498.3362204829.

The spelling of 123756313 in words is "one hundred twenty-three million, seven hundred fifty-six thousand, three hundred thirteen".