123720603 has 16 divisors (see below), whose sum is σ = 168544800. Its totient is φ = 80697344.

The previous prime is 123720601. The next prime is 123720617. The reversal of 123720603 is 306027321.

It is a cyclic number.

It is not a de Polignac number, because 123720603 - 2¹ = 123720601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123720601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70525 + ... + 72257.

It is an arithmetic number, because the mean of its divisors is an integer number (10534050).

Almost surely, 2^123720603 is an apocalyptic number.

123720603 is a deficient number, since it is larger than the sum of its proper divisors (44824197).

123720603 is a wasteful number, since it uses less digits than its factorization.

123720603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 123720603 is about 11122.9763552747. The cubic root of 123720603 is about 498.2882840776.

Adding to 123720603 its reverse (306027321), we get a palindrome (429747924).

The spelling of 123720603 in words is "one hundred twenty-three million, seven hundred twenty thousand, six hundred three".