728123599 has 4 divisors (see below), whose sum is σ = 832141264. Its totient is φ = 624105936.

The previous prime is 728123579. The next prime is 728123603. The reversal of 728123599 is 995321827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 995321827 = 1409 ⋅706403.

It is a cyclic number.

It is not a de Polignac number, because 728123599 - 2⁷ = 728123471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728123579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52008822 + ... + 52008835.

It is an arithmetic number, because the mean of its divisors is an integer number (208035316).

Almost surely, 2^728123599 is an apocalyptic number.

728123599 is a deficient number, since it is larger than the sum of its proper divisors (104017665).

728123599 is a wasteful number, since it uses less digits than its factorization.

728123599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104017664.

The product of its digits is 272160, while the sum is 46.

The square root of 728123599 is about 26983.7654711124. The cubic root of 728123599 is about 899.6391965281.

The spelling of 728123599 in words is "seven hundred twenty-eight million, one hundred twenty-three thousand, five hundred ninety-nine".