854531009 has 2 divisors, whose sum is σ = 854531010. Its totient is φ = 854531008.

The previous prime is 854530991. The next prime is 854531053. The reversal of 854531009 is 900135458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854275984 + 255025 = 29228^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 854531009 - 2²⁴ = 837753793 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 854531009.

It is not a weakly prime, because it can be changed into another prime (854531059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427265504 + 427265505.

It is an arithmetic number, because the mean of its divisors is an integer number (427265505).

Almost surely, 2^854531009 is an apocalyptic number.

It is an amenable number.

854531009 is a deficient number, since it is larger than the sum of its proper divisors (1).

854531009 is an equidigital number, since it uses as much as digits as its factorization.

854531009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 854531009 is about 29232.3623574969. The cubic root of 854531009 is about 948.9484242289.

The spelling of 854531009 in words is "eight hundred fifty-four million, five hundred thirty-one thousand, nine".