1999393289 has 8 divisors (see below), whose sum is σ = 2089741632. Its totient is φ = 1909329840.

The previous prime is 1999393283. The next prime is 1999393337. The reversal of 1999393289 is 9823939991.

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

It is a cyclic number.

It is not a de Polignac number, because 1999393289 - 2¹⁶ = 1999327753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999393283) 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, 56807 + ... + 85004.

It is an arithmetic number, because the mean of its divisors is an integer number (261217704).

Almost surely, 2^1999393289 is an apocalyptic number.

It is an amenable number.

1999393289 is a deficient number, since it is larger than the sum of its proper divisors (90348343).

1999393289 is a wasteful number, since it uses less digits than its factorization.

1999393289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142447.

The product of its digits is 8503056, while the sum is 62.

The square root of 1999393289 is about 44714.5758002913. The cubic root of 1999393289 is about 1259.7936356834.

The spelling of 1999393289 in words is "one billion, nine hundred ninety-nine million, three hundred ninety-three thousand, two hundred eighty-nine".