123012903 has 12 divisors (see below), whose sum is σ = 177605160. Its totient is φ = 75699936.

The previous prime is 123012887. The next prime is 123012913. The reversal of 123012903 is 309210321.

It is a happy number.

It is not a de Polignac number, because 123012903 - 2⁴ = 123012887 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 123012903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120808 + ... + 121821.

It is an arithmetic number, because the mean of its divisors is an integer number (14800430).

Almost surely, 2^123012903 is an apocalyptic number.

123012903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123012903 is a deficient number, since it is larger than the sum of its proper divisors (54592257).

123012903 is a wasteful number, since it uses less digits than its factorization.

123012903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242658 (or 242645 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 123012903 is about 11091.1182033193. The cubic root of 123012903 is about 497.3363727103.

The spelling of 123012903 in words is "one hundred twenty-three million, twelve thousand, nine hundred three".