784866749 has 2 divisors, whose sum is σ = 784866750. Its totient is φ = 784866748.

The previous prime is 784866739. The next prime is 784866751. The reversal of 784866749 is 947668487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751746724 + 33120025 = 27418^2 + 5755^2 .

It is a cyclic number.

It is not a de Polignac number, because 784866749 - 2⁸ = 784866493 is a prime.

Together with 784866751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (784866739) 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 as a sum of consecutive naturals, namely, 392433374 + 392433375.

It is an arithmetic number, because the mean of its divisors is an integer number (392433375).

Almost surely, 2^784866749 is an apocalyptic number.

It is an amenable number.

784866749 is a deficient number, since it is larger than the sum of its proper divisors (1).

784866749 is an equidigital number, since it uses as much as digits as its factorization.

784866749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16257024, while the sum is 59.

The square root of 784866749 is about 28015.4733852562. The cubic root of 784866749 is about 922.4269369259.

The spelling of 784866749 in words is "seven hundred eighty-four million, eight hundred sixty-six thousand, seven hundred forty-nine".