994427784101 has 4 divisors (see below), whose sum is σ = 1003228030092. Its totient is φ = 985627538112.

The previous prime is 994427784071. The next prime is 994427784109. The reversal of 994427784101 is 101487724499.

994427784101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 997210²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17522875876 + 976904908225 = 132374^2 + 988385^2 .

It is a cyclic number.

It is not a de Polignac number, because 994427784101 - 2¹⁰ = 994427783077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994427784109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4400122826 + ... + 4400123051.

It is an arithmetic number, because the mean of its divisors is an integer number (250807007523).

Almost surely, 2^994427784101 is an apocalyptic number.

It is an amenable number.

994427784101 is a deficient number, since it is larger than the sum of its proper divisors (8800245991).

994427784101 is a wasteful number, since it uses less digits than its factorization.

994427784101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8800245990.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 994427784101 in words is "nine hundred ninety-four billion, four hundred twenty-seven million, seven hundred eighty-four thousand, one hundred one".