854897389 has 2 divisors, whose sum is σ = 854897390. Its totient is φ = 854897388.

The previous prime is 854897387. The next prime is 854897401. The reversal of 854897389 is 983798458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844367364 + 10530025 = 29058^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 854897389 - 2¹ = 854897387 is a prime.

Together with 854897387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854897383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427448694 + 427448695.

It is an arithmetic number, because the mean of its divisors is an integer number (427448695).

Almost surely, 2^854897389 is an apocalyptic number.

It is an amenable number.

854897389 is a deficient number, since it is larger than the sum of its proper divisors (1).

854897389 is an equidigital number, since it uses as much as digits as its factorization.

854897389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 61.

The square root of 854897389 is about 29238.6283707017. The cubic root of 854897389 is about 949.0840253338.

The spelling of 854897389 in words is "eight hundred fifty-four million, eight hundred ninety-seven thousand, three hundred eighty-nine".