899973 has 18 divisors (see below), whose sum is σ = 1376934. Its totient is φ = 566352.

The previous prime is 899971. The next prime is 899981. The reversal of 899973 is 379998.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 636804 + 263169 = 798^2 + 513^2 .

It is not a de Polignac number, because 899973 - 2¹ = 899971 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3111 + ... + 3387.

2⁸⁹⁹⁹⁷³ is an apocalyptic number.

It is an amenable number.

899973 is a deficient number, since it is larger than the sum of its proper divisors (476961).

899973 is a wasteful number, since it uses less digits than its factorization.

899973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 299 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 899973 is about 948.6690676943. The cubic root of 899973 is about 96.5479729615.

It can be divided in two parts, 89997 and 3, that added together give a square (90000 = 300²).

The spelling of 899973 in words is "eight hundred ninety-nine thousand, nine hundred seventy-three".