123403405 has 8 divisors (see below), whose sum is σ = 152861184. Its totient is φ = 95538000.

The previous prime is 123403387. The next prime is 123403411. The reversal of 123403405 is 504304321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123403405 - 2⁷ = 123403277 is a prime.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 397921 + ... + 398230.

It is an arithmetic number, because the mean of its divisors is an integer number (19107648).

Almost surely, 2^123403405 is an apocalyptic number.

It is an amenable number.

123403405 is a deficient number, since it is larger than the sum of its proper divisors (29457779).

123403405 is an equidigital number, since it uses as much as digits as its factorization.

123403405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796187.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 123403405 is about 11108.7085207957. The cubic root of 123403405 is about 497.8620782772.

Adding to 123403405 its reverse (504304321), we get a palindrome (627707726).

The spelling of 123403405 in words is "one hundred twenty-three million, four hundred three thousand, four hundred five".