3405999 has 4 divisors (see below), whose sum is σ = 4541336. Its totient is φ = 2270664.

The previous prime is 3405979. The next prime is 3406003. The reversal of 3405999 is 9995043.

It is a happy number.

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

It is not a de Polignac number, because 3405999 - 2¹¹ = 3403951 is a prime.

It is a D-number.

It is a Duffinian number.

3405999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3405929) 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, 567664 + ... + 567669.

It is an arithmetic number, because the mean of its divisors is an integer number (1135334).

Almost surely, 2^3405999 is an apocalyptic number.

3405999 is a deficient number, since it is larger than the sum of its proper divisors (1135337).

3405999 is a wasteful number, since it uses less digits than its factorization.

3405999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135336.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 3405999 is about 1845.5348818161. The cubic root of 3405999 is about 150.4578455390.

The spelling of 3405999 in words is "three million, four hundred five thousand, nine hundred ninety-nine".