838905623 has 2 divisors, whose sum is σ = 838905624. Its totient is φ = 838905622.

The previous prime is 838905581. The next prime is 838905637. The reversal of 838905623 is 326509838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 838905623 - 2¹² = 838901527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838905653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419452811 + 419452812.

It is an arithmetic number, because the mean of its divisors is an integer number (419452812).

Almost surely, 2^838905623 is an apocalyptic number.

838905623 is a deficient number, since it is larger than the sum of its proper divisors (1).

838905623 is an equidigital number, since it uses as much as digits as its factorization.

838905623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 838905623 is about 28963.8675421636. The cubic root of 838905623 is about 943.1288611783.

The spelling of 838905623 in words is "eight hundred thirty-eight million, nine hundred five thousand, six hundred twenty-three".