994643 has 4 divisors (see below), whose sum is σ = 1071168. Its totient is φ = 918120.

The previous prime is 994621. The next prime is 994657. The reversal of 994643 is 346499.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346499 = 157 ⋅2207.

It is a cyclic number.

It is not a de Polignac number, because 994643 - 2⁶ = 994579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994603) 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, 38243 + ... + 38268.

It is an arithmetic number, because the mean of its divisors is an integer number (267792).

2⁹⁹⁴⁶⁴³ is an apocalyptic number.

994643 is a deficient number, since it is larger than the sum of its proper divisors (76525).

994643 is a wasteful number, since it uses less digits than its factorization.

994643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76524.

The product of its digits is 23328, while the sum is 35.

The square root of 994643 is about 997.3179031783. The cubic root of 994643 is about 99.8211135204.

The spelling of 994643 in words is "nine hundred ninety-four thousand, six hundred forty-three".