999373 has 4 divisors (see below), whose sum is σ = 1042848. Its totient is φ = 955900.

The previous prime is 999371. The next prime is 999377. The reversal of 999373 is 373999.

It is a happy number.

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 999373 - 2¹ = 999371 is a prime.

It is a Duffinian number.

999373 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999371) 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, 21703 + ... + 21748.

It is an arithmetic number, because the mean of its divisors is an integer number (260712).

2⁹⁹⁹³⁷³ is an apocalyptic number.

It is an amenable number.

999373 is a deficient number, since it is larger than the sum of its proper divisors (43475).

999373 is a wasteful number, since it uses less digits than its factorization.

999373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43474.

The product of its digits is 45927, while the sum is 40.

The square root of 999373 is about 999.6864508435. The cubic root of 999373 is about 99.9790956304.

The spelling of 999373 in words is "nine hundred ninety-nine thousand, three hundred seventy-three".