994166291 has 2 divisors, whose sum is σ = 994166292. Its totient is φ = 994166290.

The previous prime is 994166267. The next prime is 994166297. The reversal of 994166291 is 192661499.

It is a strong prime.

It is an emirp because it is prime and its reverse (192661499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994166291 - 2²⁶ = 927057427 is a prime.

It is a super-2 number, since 2×994166291² = 1976733228321393362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (994166297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497083145 + 497083146.

It is an arithmetic number, because the mean of its divisors is an integer number (497083146).

Almost surely, 2^994166291 is an apocalyptic number.

994166291 is a deficient number, since it is larger than the sum of its proper divisors (1).

994166291 is an equidigital number, since it uses as much as digits as its factorization.

994166291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 994166291 is about 31530.4026457005. The cubic root of 994166291 is about 998.0516366791.

The spelling of 994166291 in words is "nine hundred ninety-four million, one hundred sixty-six thousand, two hundred ninety-one".