994391 has 2 divisors, whose sum is σ = 994392. Its totient is φ = 994390.

The previous prime is 994369. The next prime is 994393. The reversal of 994391 is 193499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 994391 - 2¹⁰ = 993367 is a prime.

Together with 994393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497195 + 497196.

It is an arithmetic number, because the mean of its divisors is an integer number (497196).

2⁹⁹⁴³⁹¹ is an apocalyptic number.

994391 is a deficient number, since it is larger than the sum of its proper divisors (1).

994391 is an equidigital number, since it uses as much as digits as its factorization.

994391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 994391 is about 997.1915563221. The cubic root of 994391 is about 99.8126826746.

The spelling of 994391 in words is "nine hundred ninety-four thousand, three hundred ninety-one".