1999449 has 6 divisors (see below), whose sum is σ = 2888106. Its totient is φ = 1332960.

The previous prime is 1999441. The next prime is 1999471. The reversal of 1999449 is 9449991.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 257049 = 1320^2 + 507^2 .

It is not a de Polignac number, because 1999449 - 2³ = 1999441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1999441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111072 + ... + 111089.

It is an arithmetic number, because the mean of its divisors is an integer number (481351).

2^1999449 is an apocalyptic number.

It is an amenable number.

1999449 is a deficient number, since it is larger than the sum of its proper divisors (888657).

1999449 is a wasteful number, since it uses less digits than its factorization.

1999449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222167 (or 222164 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1999449 is about 1414.0187410356. The cubic root of 1999449 is about 125.9805336518.

The spelling of 1999449 in words is "one million, nine hundred ninety-nine thousand, four hundred forty-nine".