854091389 has 2 divisors, whose sum is σ = 854091390. Its totient is φ = 854091388.

The previous prime is 854091353. The next prime is 854091391. The reversal of 854091389 is 983190458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511212100 + 342879289 = 22610^2 + 18517^2 .

It is a cyclic number.

It is not a de Polignac number, because 854091389 - 2¹⁶ = 854025853 is a prime.

Together with 854091391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854091349) 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, 427045694 + 427045695.

It is an arithmetic number, because the mean of its divisors is an integer number (427045695).

Almost surely, 2^854091389 is an apocalyptic number.

It is an amenable number.

854091389 is a deficient number, since it is larger than the sum of its proper divisors (1).

854091389 is an equidigital number, since it uses as much as digits as its factorization.

854091389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 854091389 is about 29224.8419841750. The cubic root of 854091389 is about 948.7856650615.

The spelling of 854091389 in words is "eight hundred fifty-four million, ninety-one thousand, three hundred eighty-nine".