123691268 has 6 divisors (see below), whose sum is σ = 216459726. Its totient is φ = 61845632.

The previous prime is 123691261. The next prime is 123691277. The reversal of 123691268 is 862196321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 97456384 + 26234884 = 9872^2 + 5122^2 .

It is not an unprimeable number, because it can be changed into a prime (123691261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15461405 + ... + 15461412.

It is an arithmetic number, because the mean of its divisors is an integer number (36076621).

Almost surely, 2^123691268 is an apocalyptic number.

It is an amenable number.

123691268 is a deficient number, since it is larger than the sum of its proper divisors (92768458).

123691268 is a wasteful number, since it uses less digits than its factorization.

123691268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30922821 (or 30922819 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 123691268 is about 11121.6576102666. The cubic root of 123691268 is about 498.2488984460.

The spelling of 123691268 in words is "one hundred twenty-three million, six hundred ninety-one thousand, two hundred sixty-eight".