123505273 has 2 divisors, whose sum is σ = 123505274. Its totient is φ = 123505272.

The previous prime is 123505267. The next prime is 123505313. The reversal of 123505273 is 372505321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116035984 + 7469289 = 10772^2 + 2733^2 .

It is an emirp because it is prime and its reverse (372505321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123505273 - 2⁹ = 123504761 is a prime.

It is not a weakly prime, because it can be changed into another prime (123505373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61752636 + 61752637.

It is an arithmetic number, because the mean of its divisors is an integer number (61752637).

Almost surely, 2^123505273 is an apocalyptic number.

It is an amenable number.

123505273 is a deficient number, since it is larger than the sum of its proper divisors (1).

123505273 is an equidigital number, since it uses as much as digits as its factorization.

123505273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 123505273 is about 11113.2926264002. The cubic root of 123505273 is about 497.9990336159. Note that the first 3 decimals are identical.

The spelling of 123505273 in words is "one hundred twenty-three million, five hundred five thousand, two hundred seventy-three".