123751013 has 2 divisors, whose sum is σ = 123751014. Its totient is φ = 123751012.

The previous prime is 123751003. The next prime is 123751031. The reversal of 123751013 is 310157321.

Together with next prime (123751031) 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., 89434849 + 34316164 = 9457^2 + 5858^2 .

It is an emirp because it is prime and its reverse (310157321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123751013 - 2¹⁴ = 123734629 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123751013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123751003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61875506 + 61875507.

It is an arithmetic number, because the mean of its divisors is an integer number (61875507).

Almost surely, 2^123751013 is an apocalyptic number.

It is an amenable number.

123751013 is a deficient number, since it is larger than the sum of its proper divisors (1).

123751013 is an equidigital number, since it uses as much as digits as its factorization.

123751013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 123751013 is about 11124.3432615144. The cubic root of 123751013 is about 498.3291064494.

The spelling of 123751013 in words is "one hundred twenty-three million, seven hundred fifty-one thousand, thirteen".