838508423 has 2 divisors, whose sum is σ = 838508424. Its totient is φ = 838508422.

The previous prime is 838508381. The next prime is 838508431. The reversal of 838508423 is 324805838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 838508423 - 2²² = 834314119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838504423) 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, 419254211 + 419254212.

It is an arithmetic number, because the mean of its divisors is an integer number (419254212).

Almost surely, 2^838508423 is an apocalyptic number.

838508423 is a deficient number, since it is larger than the sum of its proper divisors (1).

838508423 is an equidigital number, since it uses as much as digits as its factorization.

838508423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 838508423 is about 28957.0099112460. The cubic root of 838508423 is about 942.9799886823.

The spelling of 838508423 in words is "eight hundred thirty-eight million, five hundred eight thousand, four hundred twenty-three".