838542847 has 2 divisors, whose sum is σ = 838542848. Its totient is φ = 838542846.

The previous prime is 838542823. The next prime is 838542857. The reversal of 838542847 is 748245838.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838542847 is a 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 838542847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838542857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419271423 + 419271424.

It is an arithmetic number, because the mean of its divisors is an integer number (419271424).

Almost surely, 2^838542847 is an apocalyptic number.

838542847 is a deficient number, since it is larger than the sum of its proper divisors (1).

838542847 is an equidigital number, since it uses as much as digits as its factorization.

838542847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1720320, while the sum is 49.

The square root of 838542847 is about 28957.6043035331. The cubic root of 838542847 is about 942.9928928257.

The spelling of 838542847 in words is "eight hundred thirty-eight million, five hundred forty-two thousand, eight hundred forty-seven".