994447777 has 4 divisors (see below), whose sum is σ = 994522816. Its totient is φ = 994372740.

The previous prime is 994447771. The next prime is 994447781. The reversal of 994447777 is 777744499.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994447777 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (994447771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11733 + ... + 46114.

It is an arithmetic number, because the mean of its divisors is an integer number (248630704).

Almost surely, 2^994447777 is an apocalyptic number.

It is an amenable number.

994447777 is a deficient number, since it is larger than the sum of its proper divisors (75039).

994447777 is a wasteful number, since it uses less digits than its factorization.

994447777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75038.

The product of its digits is 12446784, while the sum is 58.

The square root of 994447777 is about 31534.8660533068. The cubic root of 994447777 is about 998.1458231531.

The spelling of 994447777 in words is "nine hundred ninety-four million, four hundred forty-seven thousand, seven hundred seventy-seven".