994308409 has 4 divisors (see below), whose sum is σ = 994371840. Its totient is φ = 994244980.

The previous prime is 994308407. The next prime is 994308431. The reversal of 994308409 is 904803499.

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, and also an emirpimes, since its reverse is a distinct semiprime: 904803499 = 127 ⋅7124437.

It is a cyclic number.

It is not a de Polignac number, because 994308409 - 2¹ = 994308407 is a prime.

It is a super-2 number, since 2×994308409² = 1977298424416222562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994308407) 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, 10764 + ... + 45874.

It is an arithmetic number, because the mean of its divisors is an integer number (248592960).

Almost surely, 2^994308409 is an apocalyptic number.

It is an amenable number.

994308409 is a deficient number, since it is larger than the sum of its proper divisors (63431).

994308409 is a wasteful number, since it uses less digits than its factorization.

994308409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63430.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 994308409 is about 31532.6562312787. The cubic root of 994308409 is about 998.0991922190.

The spelling of 994308409 in words is "nine hundred ninety-four million, three hundred eight thousand, four hundred nine".