123665503 has 8 divisors (see below), whose sum is σ = 138968928. Its totient is φ = 109189344.

The previous prime is 123665501. The next prime is 123665519. The reversal of 123665503 is 305566321.

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

It is a cyclic number.

It is not a de Polignac number, because 123665503 - 2¹ = 123665501 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 (123665501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206500 + ... + 207097.

It is an arithmetic number, because the mean of its divisors is an integer number (17371116).

Almost surely, 2^123665503 is an apocalyptic number.

123665503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123665503 is a deficient number, since it is larger than the sum of its proper divisors (15303425).

123665503 is a wasteful number, since it uses less digits than its factorization.

123665503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413633.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 123665503 is about 11120.4992244054. The cubic root of 123665503 is about 498.2143008156.

The spelling of 123665503 in words is "one hundred twenty-three million, six hundred sixty-five thousand, five hundred three".