993784349 has 4 divisors (see below), whose sum is σ = 1003623900. Its totient is φ = 983944800.

The previous prime is 993784343. The next prime is 993784357. The reversal of 993784349 is 943487399.

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 759388249 + 234396100 = 27557^2 + 15310^2 .

It is a cyclic number.

It is not a de Polignac number, because 993784349 - 2⁴ = 993784333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 993784294 and 993784303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993784343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4919624 + ... + 4919825.

It is an arithmetic number, because the mean of its divisors is an integer number (250905975).

Almost surely, 2^993784349 is an apocalyptic number.

It is an amenable number.

993784349 is a deficient number, since it is larger than the sum of its proper divisors (9839551).

993784349 is a wasteful number, since it uses less digits than its factorization.

993784349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9839550.

The product of its digits is 5878656, while the sum is 56.

The square root of 993784349 is about 31524.3453381668. The cubic root of 993784349 is about 997.9238087464.

The spelling of 993784349 in words is "nine hundred ninety-three million, seven hundred eighty-four thousand, three hundred forty-nine".