994488889 has 2 divisors, whose sum is σ = 994488890. Its totient is φ = 994488888.

The previous prime is 994488811. The next prime is 994488919. The reversal of 994488889 is 988884499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 941998864 + 52490025 = 30692^2 + 7245^2 .

It is a cyclic number.

It is not a de Polignac number, because 994488889 - 2⁹ = 994488377 is a prime.

It is not a weakly prime, because it can be changed into another prime (994488809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497244444 + 497244445.

It is an arithmetic number, because the mean of its divisors is an integer number (497244445).

Almost surely, 2^994488889 is an apocalyptic number.

It is an amenable number.

994488889 is a deficient number, since it is larger than the sum of its proper divisors (1).

994488889 is an equidigital number, since it uses as much as digits as its factorization.

994488889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47775744, while the sum is 67.

The square root of 994488889 is about 31535.5178964925. The cubic root of 994488889 is about 998.1595779245.

The spelling of 994488889 in words is "nine hundred ninety-four million, four hundred eighty-eight thousand, eight hundred eighty-nine".