2019999 has 8 divisors (see below), whose sum is σ = 2701440. Its totient is φ = 1342616.

The previous prime is 2019977. The next prime is 2020001. The reversal of 2019999 is 9999102.

It is a happy number.

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 2019999 - 2⁵ = 2019967 is a prime.

2019999 is a modest number, since divided by 9999 gives 201 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019959) 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, 454 + ... + 2060.

It is an arithmetic number, because the mean of its divisors is an integer number (337680).

2^2019999 is an apocalyptic number.

2019999 is a deficient number, since it is larger than the sum of its proper divisors (681441).

2019999 is a wasteful number, since it uses less digits than its factorization.

2019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029.

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 2019999 is about 1421.2666885564. The cubic root of 2019999 is about 126.4106656265.

The spelling of 2019999 in words is "two million, nineteen thousand, nine hundred ninety-nine".