994581191 has 2 divisors, whose sum is σ = 994581192. Its totient is φ = 994581190.

The previous prime is 994581173. The next prime is 994581197. The reversal of 994581191 is 191185499.

994581191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 994581191 - 2¹⁸ = 994319047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994581197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497290595 + 497290596.

It is an arithmetic number, because the mean of its divisors is an integer number (497290596).

Almost surely, 2^994581191 is an apocalyptic number.

994581191 is a deficient number, since it is larger than the sum of its proper divisors (1).

994581191 is an equidigital number, since it uses as much as digits as its factorization.

994581191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 47.

The square root of 994581191 is about 31536.9813235192. The cubic root of 994581191 is about 998.1904578657.

The spelling of 994581191 in words is "nine hundred ninety-four million, five hundred eighty-one thousand, one hundred ninety-one".