1999345 has 8 divisors (see below), whose sum is σ = 2476800. Its totient is φ = 1547760.

The previous prime is 1999343. The next prime is 1999363. The reversal of 1999345 is 5439991.

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

It is not a de Polignac number, because 1999345 - 2¹ = 1999343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1999298 and 1999307.

It is not an unprimeable number, because it can be changed into a prime (1999343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6295 + ... + 6604.

It is an arithmetic number, because the mean of its divisors is an integer number (309600).

2^1999345 is an apocalyptic number.

It is an amenable number.

1999345 is a deficient number, since it is larger than the sum of its proper divisors (477455).

1999345 is a wasteful number, since it uses less digits than its factorization.

1999345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12935.

The product of its digits is 43740, while the sum is 40.

The square root of 1999345 is about 1413.9819659387. The cubic root of 1999345 is about 125.9783493496.

The spelling of 1999345 in words is "one million, nine hundred ninety-nine thousand, three hundred forty-five".