838406339 has 2 divisors, whose sum is σ = 838406340. Its totient is φ = 838406338.

The previous prime is 838406329. The next prime is 838406363. The reversal of 838406339 is 933604838.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 838406339 - 2⁸ = 838406083 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 838406339.

It is not a weakly prime, because it can be changed into another prime (838406329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419203169 + 419203170.

It is an arithmetic number, because the mean of its divisors is an integer number (419203170).

Almost surely, 2^838406339 is an apocalyptic number.

838406339 is a deficient number, since it is larger than the sum of its proper divisors (1).

838406339 is an equidigital number, since it uses as much as digits as its factorization.

838406339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 838406339 is about 28955.2471755984. The cubic root of 838406339 is about 942.9417195076.

The spelling of 838406339 in words is "eight hundred thirty-eight million, four hundred six thousand, three hundred thirty-nine".