1999398828003 has 4 divisors (see below), whose sum is σ = 2665865104008. Its totient is φ = 1332932552000.

The previous prime is 1999398827999. The next prime is 1999398828013. The reversal of 1999398828003 is 3008288939991.

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 1999398828003 - 2² = 1999398827999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1999398828013) 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, 333233137998 + ... + 333233138003.

It is an arithmetic number, because the mean of its divisors is an integer number (666466276002).

Almost surely, 2^{1999398828003} is an apocalyptic number.

1999398828003 is a deficient number, since it is larger than the sum of its proper divisors (666466276005).

1999398828003 is an equidigital number, since it uses as much as digits as its factorization.

1999398828003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666466276004.

The product of its (nonzero) digits is 60466176, while the sum is 69.

The spelling of 1999398828003 in words is "one trillion, nine hundred ninety-nine billion, three hundred ninety-eight million, eight hundred twenty-eight thousand, three".