123305355 has 16 divisors (see below), whose sum is σ = 219209760. Its totient is φ = 65762784.

The previous prime is 123305311. The next prime is 123305359. The reversal of 123305355 is 553503321.

123305355 is a `hidden beast` number, since 1 + 2 + 3 + 305 + 355 = 666.

It is not a de Polignac number, because 123305355 - 2⁶ = 123305291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123305359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456552 + ... + 456821.

It is an arithmetic number, because the mean of its divisors is an integer number (13700610).

Almost surely, 2^123305355 is an apocalyptic number.

123305355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123305355 is a deficient number, since it is larger than the sum of its proper divisors (95904405).

123305355 is an equidigital number, since it uses as much as digits as its factorization.

123305355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913387 (or 913381 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The square root of 123305355 is about 11104.2944395400. The cubic root of 123305355 is about 497.7301848036.

Adding to 123305355 its reverse (553503321), we get a palindrome (676808676).

The spelling of 123305355 in words is "one hundred twenty-three million, three hundred five thousand, three hundred fifty-five".