994395989 has 16 divisors (see below), whose sum is σ = 1066598400. Its totient is φ = 924331824.

The previous prime is 994395931. The next prime is 994396009. The reversal of 994395989 is 989593499.

It is a cyclic number.

It is not a de Polignac number, because 994395989 - 2⁸ = 994395733 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994395089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248684 + ... + 252650.

It is an arithmetic number, because the mean of its divisors is an integer number (66662400).

Almost surely, 2^994395989 is an apocalyptic number.

It is an amenable number.

994395989 is a deficient number, since it is larger than the sum of its proper divisors (72202411).

994395989 is a wasteful number, since it uses less digits than its factorization.

994395989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4232.

The product of its digits is 28343520, while the sum is 65.

The square root of 994395989 is about 31534.0449197371. The cubic root of 994395989 is about 998.1284959911.

The spelling of 994395989 in words is "nine hundred ninety-four million, three hundred ninety-five thousand, nine hundred eighty-nine".