999728395 has 4 divisors (see below), whose sum is σ = 1199674080. Its totient is φ = 799782712.

The previous prime is 999728381. The next prime is 999728413. The reversal of 999728395 is 593827999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999728395 - 2¹³ = 999720203 is a prime.

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, 99972835 + ... + 99972844.

It is an arithmetic number, because the mean of its divisors is an integer number (299918520).

Almost surely, 2^999728395 is an apocalyptic number.

999728395 is a deficient number, since it is larger than the sum of its proper divisors (199945685).

999728395 is a wasteful number, since it uses less digits than its factorization.

999728395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199945684.

The product of its digits is 11022480, while the sum is 61.

The square root of 999728395 is about 31618.4818579261. The cubic root of 999728395 is about 999.9094568022.

The spelling of 999728395 in words is "nine hundred ninety-nine million, seven hundred twenty-eight thousand, three hundred ninety-five".