123389503 has 4 divisors (see below), whose sum is σ = 128754288. Its totient is φ = 118024720.

The previous prime is 123389501. The next prime is 123389527. The reversal of 123389503 is 305983321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123389503 - 2¹ = 123389501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123389501) 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 3 ways as a sum of consecutive naturals, for example, 2682358 + ... + 2682403.

It is an arithmetic number, because the mean of its divisors is an integer number (32188572).

Almost surely, 2^123389503 is an apocalyptic number.

123389503 is a deficient number, since it is larger than the sum of its proper divisors (5364785).

123389503 is an equidigital number, since it uses as much as digits as its factorization.

123389503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5364784.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 123389503 is about 11108.0827778695. The cubic root of 123389503 is about 497.8433820385.

The spelling of 123389503 in words is "one hundred twenty-three million, three hundred eighty-nine thousand, five hundred three".