994945489 has 2 divisors, whose sum is σ = 994945490. Its totient is φ = 994945488.

The previous prime is 994945487. The next prime is 994945499. The reversal of 994945489 is 984549499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994771600 + 173889 = 31540^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 994945489 - 2¹ = 994945487 is a prime.

It is a super-3 number, since 3×994945489³ (a number of 28 digits) contains 333 as substring.

Together with 994945487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (994945487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497472744 + 497472745.

It is an arithmetic number, because the mean of its divisors is an integer number (497472745).

Almost surely, 2^994945489 is an apocalyptic number.

It is an amenable number.

994945489 is a deficient number, since it is larger than the sum of its proper divisors (1).

994945489 is an equidigital number, since it uses as much as digits as its factorization.

994945489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 61.

The square root of 994945489 is about 31542.7565219021. The cubic root of 994945489 is about 998.3123163261.

The spelling of 994945489 in words is "nine hundred ninety-four million, nine hundred forty-five thousand, four hundred eighty-nine".