123143403 has 16 divisors (see below), whose sum is σ = 172396800. Its totient is φ = 78037344.

The previous prime is 123143381. The next prime is 123143407. The reversal of 123143403 is 304341321.

It is not a de Polignac number, because 123143403 - 2¹⁰ = 123142379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123143403.

It is not an unprimeable number, because it can be changed into a prime (123143407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5773 + ... + 16721.

It is an arithmetic number, because the mean of its divisors is an integer number (10774800).

Almost surely, 2^123143403 is an apocalyptic number.

123143403 is a deficient number, since it is larger than the sum of its proper divisors (49253397).

123143403 is a wasteful number, since it uses less digits than its factorization.

123143403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11138.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 123143403 is about 11096.9997296567. Note that the first 3 decimals coincide. The cubic root of 123143403 is about 497.5121793606.

Adding to 123143403 its reverse (304341321), we get a palindrome (427484724).

The spelling of 123143403 in words is "one hundred twenty-three million, one hundred forty-three thousand, four hundred three".