899543 has 4 divisors (see below), whose sum is σ = 901680. Its totient is φ = 897408.

The previous prime is 899537. The next prime is 899611. The reversal of 899543 is 345998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345998 = 2 ⋅172999.

It is a cyclic number.

It is not a de Polignac number, because 899543 - 2¹⁰ = 898519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 899497 and 899506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890543) 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, 203 + ... + 1356.

It is an arithmetic number, because the mean of its divisors is an integer number (225420).

2⁸⁹⁹⁵⁴³ is an apocalyptic number.

899543 is a deficient number, since it is larger than the sum of its proper divisors (2137).

899543 is a wasteful number, since it uses less digits than its factorization.

899543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its digits is 38880, while the sum is 38.

The square root of 899543 is about 948.4424073184. The cubic root of 899543 is about 96.5325938920.

The spelling of 899543 in words is "eight hundred ninety-nine thousand, five hundred forty-three".