994208689 has 2 divisors, whose sum is σ = 994208690. Its totient is φ = 994208688.

The previous prime is 994208659. The next prime is 994208723. The reversal of 994208689 is 986802499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 738752400 + 255456289 = 27180^2 + 15983^2 .

It is a cyclic number.

It is not a de Polignac number, because 994208689 - 2¹³ = 994200497 is a prime.

It is not a weakly prime, because it can be changed into another prime (994208639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497104344 + 497104345.

It is an arithmetic number, because the mean of its divisors is an integer number (497104345).

Almost surely, 2^994208689 is an apocalyptic number.

It is an amenable number.

994208689 is a deficient number, since it is larger than the sum of its proper divisors (1).

994208689 is an equidigital number, since it uses as much as digits as its factorization.

994208689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 994208689 is about 31531.0749737461. The cubic root of 994208689 is about 998.0658243766.

The spelling of 994208689 in words is "nine hundred ninety-four million, two hundred eight thousand, six hundred eighty-nine".