994435909 has 4 divisors (see below), whose sum is σ = 1009278304. Its totient is φ = 979593516.

The previous prime is 994435867. The next prime is 994435913. The reversal of 994435909 is 909534499.

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: 909534499 = 19249 ⋅47251.

It is a cyclic number.

It is not a de Polignac number, because 994435909 - 2⁹ = 994435397 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 (994435999) 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, 7421097 + ... + 7421230.

It is an arithmetic number, because the mean of its divisors is an integer number (252319576).

Almost surely, 2^994435909 is an apocalyptic number.

It is an amenable number.

994435909 is a deficient number, since it is larger than the sum of its proper divisors (14842395).

994435909 is a wasteful number, since it uses less digits than its factorization.

994435909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14842394.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 994435909 is about 31534.6778800735. The cubic root of 994435909 is about 998.1418524261.

The spelling of 994435909 in words is "nine hundred ninety-four million, four hundred thirty-five thousand, nine hundred nine".