784968421 has 4 divisors (see below), whose sum is σ = 831143052. Its totient is φ = 738793792.

The previous prime is 784968419. The next prime is 784968439. The reversal of 784968421 is 124869487.

It is a happy number.

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 596043396 + 188925025 = 24414^2 + 13745^2 .

It is a cyclic number.

It is not a de Polignac number, because 784968421 - 2¹ = 784968419 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 (784962421) 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, 23087290 + ... + 23087323.

It is an arithmetic number, because the mean of its divisors is an integer number (207785763).

Almost surely, 2^784968421 is an apocalyptic number.

It is an amenable number.

784968421 is a deficient number, since it is larger than the sum of its proper divisors (46174631).

784968421 is a wasteful number, since it uses less digits than its factorization.

784968421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46174630.

The product of its digits is 774144, while the sum is 49.

The square root of 784968421 is about 28017.2878951550. The cubic root of 784968421 is about 922.4667657428.

The spelling of 784968421 in words is "seven hundred eighty-four million, nine hundred sixty-eight thousand, four hundred twenty-one".