123705613 has 2 divisors, whose sum is σ = 123705614. Its totient is φ = 123705612.

The previous prime is 123705557. The next prime is 123705629. The reversal of 123705613 is 316507321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77492809 + 46212804 = 8803^2 + 6798^2 .

It is a cyclic number.

It is not a de Polignac number, because 123705613 - 2¹³ = 123697421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123706613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61852806 + 61852807.

It is an arithmetic number, because the mean of its divisors is an integer number (61852807).

Almost surely, 2^123705613 is an apocalyptic number.

It is an amenable number.

123705613 is a deficient number, since it is larger than the sum of its proper divisors (1).

123705613 is an equidigital number, since it uses as much as digits as its factorization.

123705613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 123705613 is about 11122.3025044278. The cubic root of 123705613 is about 498.2681590462.

It can be divided in two parts, 12 and 3705613, that added together give a square (3705625 = 1925²).

The spelling of 123705613 in words is "one hundred twenty-three million, seven hundred five thousand, six hundred thirteen".