123743513 has 2 divisors, whose sum is σ = 123743514. Its totient is φ = 123743512.

The previous prime is 123743509. The next prime is 123743531. The reversal of 123743513 is 315347321.

Together with next prime (123743531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116920969 + 6822544 = 10813^2 + 2612^2 .

It is a cyclic number.

It is not a de Polignac number, because 123743513 - 2² = 123743509 is a prime.

It is not a weakly prime, because it can be changed into another prime (123742513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61871756 + 61871757.

It is an arithmetic number, because the mean of its divisors is an integer number (61871757).

Almost surely, 2^123743513 is an apocalyptic number.

It is an amenable number.

123743513 is a deficient number, since it is larger than the sum of its proper divisors (1).

123743513 is an equidigital number, since it uses as much as digits as its factorization.

123743513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 123743513 is about 11124.0061578552. The cubic root of 123743513 is about 498.3190390738.

The spelling of 123743513 in words is "one hundred twenty-three million, seven hundred forty-three thousand, five hundred thirteen".