123728699 has 8 divisors (see below), whose sum is σ = 125790480. Its totient is φ = 121673376.

The previous prime is 123728663. The next prime is 123728711. The reversal of 123728699 is 996827321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123728699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123788699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50597 + ... + 52985.

It is an arithmetic number, because the mean of its divisors is an integer number (15723810).

Almost surely, 2^123728699 is an apocalyptic number.

123728699 is a deficient number, since it is larger than the sum of its proper divisors (2061781).

123728699 is an equidigital number, since it uses as much as digits as its factorization.

123728699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229.

The product of its digits is 326592, while the sum is 47.

The square root of 123728699 is about 11123.3402806891. The cubic root of 123728699 is about 498.2991527981.

The spelling of 123728699 in words is "one hundred twenty-three million, seven hundred twenty-eight thousand, six hundred ninety-nine".