1999453 has 4 divisors (see below), whose sum is σ = 2014848. Its totient is φ = 1984060.

The previous prime is 1999441. The next prime is 1999471. The reversal of 1999453 is 3549991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1999453 - 2¹⁷ = 1868381 is a prime.

It is a Duffinian number.

1999453 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999423) 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 3 ways as a sum of consecutive naturals, for example, 7501 + ... + 7762.

It is an arithmetic number, because the mean of its divisors is an integer number (503712).

2^1999453 is an apocalyptic number.

It is an amenable number.

1999453 is a deficient number, since it is larger than the sum of its proper divisors (15395).

1999453 is a wasteful number, since it uses less digits than its factorization.

1999453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15394.

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

The square root of 1999453 is about 1414.0201554433. The cubic root of 1999453 is about 125.9806176619.

The spelling of 1999453 in words is "one million, nine hundred ninety-nine thousand, four hundred fifty-three".