123399772 has 12 divisors (see below), whose sum is σ = 217931560. Its totient is φ = 61133616.

The previous prime is 123399751. The next prime is 123399781. The reversal of 123399772 is 277993321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141078 + ... + 141949.

Almost surely, 2^123399772 is an apocalyptic number.

It is an amenable number.

123399772 is a deficient number, since it is larger than the sum of its proper divisors (94531788).

123399772 is a wasteful number, since it uses less digits than its factorization.

123399772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283140 (or 283138 counting only the distinct ones).

The product of its digits is 142884, while the sum is 43.

The square root of 123399772 is about 11108.5449992337. The cubic root of 123399772 is about 497.8571925376.

The spelling of 123399772 in words is "one hundred twenty-three million, three hundred ninety-nine thousand, seven hundred seventy-two".