123817916 has 6 divisors (see below), whose sum is σ = 216681360. Its totient is φ = 61908956.

The previous prime is 123817879. The next prime is 123817921. The reversal of 123817916 is 619718321.

It is a self number, because there is not a number n which added to its sum of digits gives 123817916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15477236 + ... + 15477243.

It is an arithmetic number, because the mean of its divisors is an integer number (36113560).

Almost surely, 2^123817916 is an apocalyptic number.

It is an amenable number.

123817916 is a deficient number, since it is larger than the sum of its proper divisors (92863444).

123817916 is a wasteful number, since it uses less digits than its factorization.

123817916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30954483 (or 30954481 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 123817916 is about 11127.3499091203. The cubic root of 123817916 is about 498.4188934744.

The spelling of 123817916 in words is "one hundred twenty-three million, eight hundred seventeen thousand, nine hundred sixteen".