123203916 has 168 divisors, whose sum is σ = 370185984. Its totient is φ = 35497440.

The previous prime is 123203891. The next prime is 123203929. The reversal of 123203916 is 619302321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 123203916.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 737665 + ... + 737831.

It is an arithmetic number, because the mean of its divisors is an integer number (2203488).

Almost surely, 2^123203916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123203916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185092992).

123203916 is an abundant number, since it is smaller than the sum of its proper divisors (246982068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123203916 is a wasteful number, since it uses less digits than its factorization.

123203916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 123203916 is about 11099.7259425627. The cubic root of 123203916 is about 497.5936589574.

The spelling of 123203916 in words is "one hundred twenty-three million, two hundred three thousand, nine hundred sixteen".