854774989 has 2 divisors, whose sum is σ = 854774990. Its totient is φ = 854774988.

The previous prime is 854774969. The next prime is 854775007. The reversal of 854774989 is 989477458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459759364 + 395015625 = 21442^2 + 19875^2 .

It is a cyclic number.

It is not a de Polignac number, because 854774989 - 2⁷ = 854774861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854774969) 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, 427387494 + 427387495.

It is an arithmetic number, because the mean of its divisors is an integer number (427387495).

Almost surely, 2^854774989 is an apocalyptic number.

It is an amenable number.

854774989 is a deficient number, since it is larger than the sum of its proper divisors (1).

854774989 is an equidigital number, since it uses as much as digits as its factorization.

854774989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 61.

The square root of 854774989 is about 29236.5351743328. The cubic root of 854774989 is about 949.0387281122.

The spelling of 854774989 in words is "eight hundred fifty-four million, seven hundred seventy-four thousand, nine hundred eighty-nine".