123136648 has 16 divisors (see below), whose sum is σ = 231197580. Its totient is φ = 61483968.

The previous prime is 123136621. The next prime is 123136679. The reversal of 123136648 is 846631321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 107785924 + 15350724 = 10382^2 + 3918^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4111 + ... + 16222.

Almost surely, 2^123136648 is an apocalyptic number.

It is an amenable number.

123136648 is a deficient number, since it is larger than the sum of its proper divisors (108060932).

123136648 is a wasteful number, since it uses less digits than its factorization.

123136648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21096 (or 21092 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 123136648 is about 11096.6953639361. The cubic root of 123136648 is about 497.5030822263.

Adding to 123136648 its reverse (846631321), we get a palindrome (969767969).

The spelling of 123136648 in words is "one hundred twenty-three million, one hundred thirty-six thousand, six hundred forty-eight".