994399 has 4 divisors (see below), whose sum is σ = 1136464. Its totient is φ = 852336.

The previous prime is 994393. The next prime is 994417. The reversal of 994399 is 993499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993499 = 13 ⋅76423.

It is a cyclic number.

It is not a de Polignac number, because 994399 - 2³ = 994391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71022 + ... + 71035.

It is an arithmetic number, because the mean of its divisors is an integer number (284116).

2⁹⁹⁴³⁹⁹ is an apocalyptic number.

994399 is a deficient number, since it is larger than the sum of its proper divisors (142065).

994399 is a wasteful number, since it uses less digits than its factorization.

994399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142064.

The product of its digits is 78732, while the sum is 43.

The square root of 994399 is about 997.1955675794. The cubic root of 994399 is about 99.8129503424.

Subtracting from 994399 its reverse (993499), we obtain a square (900 = 30²).

The spelling of 994399 in words is "nine hundred ninety-four thousand, three hundred ninety-nine".