1999133 has 4 divisors (see below), whose sum is σ = 2012700. Its totient is φ = 1985568.

The previous prime is 1999121. The next prime is 1999163. The reversal of 1999133 is 3319991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3319991 = 313 ⋅10607.

It can be written as a sum of positive squares in 2 ways, for example, as 466489 + 1532644 = 683^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999133 - 2⁶ = 1999069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1999093 and 1999102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999103) 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, 6560 + ... + 6857.

It is an arithmetic number, because the mean of its divisors is an integer number (503175).

2^1999133 is an apocalyptic number.

It is an amenable number.

1999133 is a deficient number, since it is larger than the sum of its proper divisors (13567).

1999133 is a wasteful number, since it uses less digits than its factorization.

1999133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13566.

The product of its digits is 6561, while the sum is 35.

The square root of 1999133 is about 1413.9069983560. The cubic root of 1999133 is about 125.9738964989.

The spelling of 1999133 in words is "one million, nine hundred ninety-nine thousand, one hundred thirty-three".