123117355 has 4 divisors (see below), whose sum is σ = 147740832. Its totient is φ = 98493880.

The previous prime is 123117341. The next prime is 123117361. The reversal of 123117355 is 553711321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553711321 = 71 ⋅7798751.

It is not a de Polignac number, because 123117355 - 2⁷ = 123117227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12311731 + ... + 12311740.

It is an arithmetic number, because the mean of its divisors is an integer number (36935208).

Almost surely, 2^123117355 is an apocalyptic number.

123117355 is a deficient number, since it is larger than the sum of its proper divisors (24623477).

123117355 is an equidigital number, since it uses as much as digits as its factorization.

123117355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24623476.

The product of its digits is 3150, while the sum is 28.

The square root of 123117355 is about 11095.8260170210. The cubic root of 123117355 is about 497.4770980089.

Adding to 123117355 its reverse (553711321), we get a palindrome (676828676).

The spelling of 123117355 in words is "one hundred twenty-three million, one hundred seventeen thousand, three hundred fifty-five".