123705013 has 4 divisors (see below), whose sum is σ = 124259968. Its totient is φ = 123150060.

The previous prime is 123705007. The next prime is 123705019. The reversal of 123705013 is 310507321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310507321 = 29 ⋅10707149.

It is an interprime number because it is at equal distance from previous prime (123705007) and next prime (123705019).

It is a cyclic number.

It is not a de Polignac number, because 123705013 - 2⁹ = 123704501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123705019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277143 + ... + 277588.

It is an arithmetic number, because the mean of its divisors is an integer number (31064992).

Almost surely, 2^123705013 is an apocalyptic number.

It is an amenable number.

123705013 is a deficient number, since it is larger than the sum of its proper divisors (554955).

123705013 is an equidigital number, since it uses as much as digits as its factorization.

123705013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554954.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 123705013 is about 11122.2755315628. The cubic root of 123705013 is about 498.2673534741.

The spelling of 123705013 in words is "one hundred twenty-three million, seven hundred five thousand, thirteen".