123727816 has 8 divisors (see below), whose sum is σ = 231989670. Its totient is φ = 61863904.

The previous prime is 123727777. The next prime is 123727831. The reversal of 123727816 is 618727321.

It can be written as a sum of positive squares in only one way, i.e., 95062500 + 28665316 = 9750^2 + 5354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7732981 + ... + 7732996.

Almost surely, 2^123727816 is an apocalyptic number.

It is an amenable number.

123727816 is a deficient number, since it is larger than the sum of its proper divisors (108261854).

123727816 is a wasteful number, since it uses less digits than its factorization.

123727816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15465983 (or 15465979 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 123727816 is about 11123.3005893035. The cubic root of 123727816 is about 498.2979674110.

The spelling of 123727816 in words is "one hundred twenty-three million, seven hundred twenty-seven thousand, eight hundred sixteen".