854138563 has 2 divisors, whose sum is σ = 854138564. Its totient is φ = 854138562.

The previous prime is 854138543. The next prime is 854138647. The reversal of 854138563 is 365831458.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-854138563 is a prime.

It is not a weakly prime, because it can be changed into another prime (854138533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427069281 + 427069282.

It is an arithmetic number, because the mean of its divisors is an integer number (427069282).

Almost surely, 2^854138563 is an apocalyptic number.

854138563 is a deficient number, since it is larger than the sum of its proper divisors (1).

854138563 is an equidigital number, since it uses as much as digits as its factorization.

854138563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The square root of 854138563 is about 29225.6490603716. The cubic root of 854138563 is about 948.8031328218.

The spelling of 854138563 in words is "eight hundred fifty-four million, one hundred thirty-eight thousand, five hundred sixty-three".