838783643 has 2 divisors, whose sum is σ = 838783644. Its totient is φ = 838783642.

The previous prime is 838783613. The next prime is 838783663. The reversal of 838783643 is 346387838.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 838783643 - 2¹⁸ = 838521499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 838783591 and 838783600.

It is not a weakly prime, because it can be changed into another prime (838783613) 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 as a sum of consecutive naturals, namely, 419391821 + 419391822.

It is an arithmetic number, because the mean of its divisors is an integer number (419391822).

Almost surely, 2^838783643 is an apocalyptic number.

838783643 is a deficient number, since it is larger than the sum of its proper divisors (1).

838783643 is an equidigital number, since it uses as much as digits as its factorization.

838783643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 50.

The square root of 838783643 is about 28961.7617385407. The cubic root of 838783643 is about 943.0831474803.

The spelling of 838783643 in words is "eight hundred thirty-eight million, seven hundred eighty-three thousand, six hundred forty-three".