994000309 has 2 divisors, whose sum is σ = 994000310. Its totient is φ = 994000308.

The previous prime is 994000279. The next prime is 994000369. The reversal of 994000309 is 903000499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497156209 + 496844100 = 22297^2 + 22290^2 .

It is a cyclic number.

It is not a de Polignac number, because 994000309 - 2¹³ = 993992117 is a prime.

It is a super-2 number, since 2×994000309² = 1976073228584190962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994000369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497000154 + 497000155.

It is an arithmetic number, because the mean of its divisors is an integer number (497000155).

Almost surely, 2^994000309 is an apocalyptic number.

It is an amenable number.

994000309 is a deficient number, since it is larger than the sum of its proper divisors (1).

994000309 is an equidigital number, since it uses as much as digits as its factorization.

994000309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 994000309 is about 31527.7704413109. The cubic root of 994000309 is about 997.9960900272.

The spelling of 994000309 in words is "nine hundred ninety-four million, three hundred nine", and thus it is an aban number.