994449661 has 4 divisors (see below), whose sum is σ = 1011304800. Its totient is φ = 977594524.

The previous prime is 994449647. The next prime is 994449679. The reversal of 994449661 is 166944499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166944499 = 349 ⋅478351.

It is a cyclic number.

It is not a de Polignac number, because 994449661 - 2¹⁵ = 994416893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 994449599 and 994449608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994449601) 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 in 3 ways as a sum of consecutive naturals, for example, 8427481 + ... + 8427598.

It is an arithmetic number, because the mean of its divisors is an integer number (252826200).

Almost surely, 2^994449661 is an apocalyptic number.

It is an amenable number.

994449661 is a deficient number, since it is larger than the sum of its proper divisors (16855139).

994449661 is a wasteful number, since it uses less digits than its factorization.

994449661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16855138.

The product of its digits is 1679616, while the sum is 52.

The square root of 994449661 is about 31534.8959249908. The cubic root of 994449661 is about 998.1464534880.

The spelling of 994449661 in words is "nine hundred ninety-four million, four hundred forty-nine thousand, six hundred sixty-one".